Many people assume that when one side of the body feels cold while the other feels hot, it is a problem with temperature regulation, or they simply dismiss it as "psychological." In reality, this is not the case. In traditional Chinese medicine (TCM) clinical practice, the coexistence of cold and heat in the body is not uncommon. It often points to an imbalance in the circulation of qi and blood and the interplay between yin and yang within the body. To put it plainly: it is not that the outside temperature is fluctuating between hot and cold, but rather that the body's internal "traffic" is blocked.
I. The Secret of Simultaneous Cold and Heat Lies in "Yin and Yang Failing to Connect Smoothly"
The Shanghan Lun (Treatise on Cold Damage), Chapter on Distinguishing Pulse, Syndromes, and Treatment of Jueyin Disease states: "All cases of jue (cold reversal) arise when yin and yang qi fail to connect smoothly with each other. Jue refers to the condition of cold extremities." The term "jue" precisely describes a state in which yin and yang qi cannot successfully meet and flow through the distal ends of the limbs. Simply put, the yang qi and yin blood of the human body should operate like two interlocking gears, working in coordination to warm the entire body. When this connecting mechanism is disrupted, a peculiar situation emerges where "areas that should be warm are not, and areas that should be cool are overly warm"—this is the underlying logic behind the simultaneous appearance of cold and heat.
From a clinical perspective, this condition is most commonly seen in people who sit for prolonged periods, engage in excessive mental rumination, and lack physical exercise. It is also frequently observed in younger populations with irregular sleep schedules and insufficient rest. Why are these groups prone to experiencing "one side cold, one side hot"? Because prolonged sitting injures the spleen, and excessive thinking depletes blood, weakening the source of qi and blood production. Meanwhile, staying up late consumes yin fluids. When qi and blood are both insufficient and their circulation channels are obstructed, yin and yang qi tend to "go their separate ways" in different regions of the body, failing to complete the normal cycle of intersection. The "separation" here is not an anatomical split, but rather a disconnection in functional rhythm: some people experience flushing and sweating in the upper body while the lower body feels as cold as ice; others have a cold left side of the body while the right side feels uncomfortably hot. This state of "separation" is precisely the body's way of reminding us that our qi mechanism needs to be reintegrated.
II. Upper Heat and Lower Cold: The Face Flares While the Soles Freeze
The Huangdi Neijing (Yellow Emperor's Classic of Internal Medicine), Suwen (Plain Questions), Chapter 62 on Regulating the Channels states: "When yang is deficient, external cold arises; when yin is deficient, internal heat arises." This reveals a phenomenon that is easily misinterpreted: the cold and heat in the exterior and interior are not necessarily consistent. Clinically, upper heat and lower cold is a very common pattern of coexisting cold and heat. Such individuals often experience facial flushing, recurrent mouth ulcers, dry and uncomfortable throat, irritability, and restlessness—yet at the same time, they have sore and weak lower back and knees, a cold sensation in the lower abdomen, feet that never seem to warm up, and even difficulty falling asleep due to coldness in the soles at night. Why does this "ice and fire" situation occur? The key lies in the disruption of the communication between heart fire and kidney water. The heart belongs to fire and resides in the upper part of the body; the kidney belongs to water and resides in the lower part. Under physiological conditions, heart fire descends to warm kidney water, and kidney water rises to moisten and restrain heart fire, forming a dynamic balance. Once the transportation and transformation pathway of the middle jiao (the spleen and stomach region) becomes blocked—for example, due to cold and raw foods damaging spleen yang, or prolonged sitting causing qi stagnation—heart fire cannot descend and kidney water cannot rise, resulting in the pattern of upper heat and lower cold.
Key Pathomechanism: Dysfunction of the Middle Jiao Pivot
The middle jiao serves as the axis of qi ascending and descending. The spleen governs the ascending of clear yang, and the stomach governs the descending of turbid yin, functioning like a traffic officer at an intersection. When this pivot fails, yang qi becomes trapped in the upper body and transforms into fire, while yin fluids stagnate in the lower body and generate cold. Such individuals often present with epigastric and abdominal distension, poor appetite, and alternating constipation and loose stools. On the tongue, one may observe a red tip, a white and greasy or swollen and tender tongue body. It is important to note that the key variable in upper heat and lower cold is the degree of patency of the middle jiao, rather than simple heart fire hyperactivity or kidney water deficiency alone—therefore, blindly clearing fire or blindly warming and supplementing may both aggravate the imbalance.
Constitution Identification: The Combined Influence of Emotions and Diet
Clinically, the upper heat and lower cold constitution is more commonly seen among individuals under prolonged stress, emotional tension, and irregular eating habits. Emotional constraint leads to liver qi depression, weakening the liver's function of governing free flow (shuxie), which further aggravates qi stagnation. Excessive consumption of cold and raw foods damages spleen yang, impairing transportation and transformation, leading to internal production of cold-dampness that obstructs the middle jiao. When these two factors combine, the manifestations of cold and heat at opposite ends become increasingly pronounced. On tongue examination, red spots at the tongue tip suggest heart fire hyperactivity, while cracks in the middle of the tongue or a greasy coating indicate dysfunction of the spleen and stomach in ascending and descending. The pulse often presents as floating at the cun (inch) position, wiry at the guan (bar) position, and weak at the chi (cubit) position—floating heat above, stagnation in the middle, and deficient cold below. The three pulse positions each "speak a different language," precisely corresponding to the state of cold and heat being separated.
III. True Cold with False Heat and True Heat with False Cold: Two Critical Conditions to Distinguish
The Shanghan Lun, Chapter on Distinguishing Pulse, Syndromes, and Treatment of Shaoyin Disease clearly states: "In shaoyin disease, there is diarrhea with undigested food, internal cold with external heat, cold reversal of the extremities, and a minute pulse on the verge of expiring." This pattern of "internal cold with external heat" is far more complex than simple upper heat and lower cold. It represents a critical state in which yang qi has declined to an extreme degree, and deficient yang is being forced to float outward. If a person's limbs are ice-cold but the chest and abdomen feel burning hot and irritable, and they are thirsty but do not wish to drink, or the face shows a flushed appearance like makeup while the spirit is listless, this may be true cold with false heat—the internal yang qi is like a charcoal fire about to go out, and the "heat" on the surface is nothing more than the last embers. Conversely, if pathogenic heat is deeply concealed within the body and yang qi is constrained and unable to reach the exterior, the extremities may appear falsely cold—this is true heat with false cold.
These two conditions are fundamentally different from ordinary mixed cold and heat: the core contradiction lies not in the blockage of qi channels, but in the stark disparity between healthy (upright) qi and pathogenic factors. On pulse examination, in true cold with false heat, the pulse is typically deep, minute, and on the verge of expiring, with weakened force upon deeper pressure; in true heat with false cold, the pulse is typically deep, replete, and forceful, becoming even more forceful with deeper pressure. On tongue examination, the former presents with a pale, swollen, tender tongue body with a white, slippery coating; the latter presents with a red or deep-red tongue body with a yellow, rough coating. In clinical practice, these conditions often indicate that the constitution has reached a relatively fragile stage. It is not advisable to self-experiment with warming or cold-natured remedies; rather, one should seek a comprehensive evaluation from a licensed TCM practitioner as early as possible, combining the four diagnostic methods for proper assessment. Especially when cold and heat manifestations are accompanied by notable changes in mental status—such as extreme fatigue, restlessness, irritability, or sluggish reactions—this suggests that the disease is undergoing a qualitative change.
IV. Left Cold and Right Heat: A Special Manifestation of Blocked Qi Circulation
In addition to the vertical division of cold above and heat below, there are also cases where cold and heat are unevenly distributed between the left and right halves of the body. TCM theory holds that the left side of the body pertains to blood and the right side pertains to qi—this is not an anatomical boundary but a classification of functional attributes. When one side of the body feels cold and the other feels hot, it often indicates that the circulation of qi and blood has deviated from its normal course. Liver qi stagnation, phlegm-dampness obstruction, and blood stasis can all lead to impaired qi flow in one half of the body. The ancient text's statement that "when blood is not smooth, it becomes water" also implies that disorders of qi, blood, and body fluid circulation are mutually influential and causally linked. If qi and blood could circulate endlessly like a ring without beginning or end, cold and heat would not be divided territorially on the body's surface.
Everyday Clues to Left-Right Imbalance
Some readers may wonder whether left-right cold and heat differences are related to sleeping posture or dominant hand use. There is indeed some correlation, but more worthy of attention is whether the left-right cold and heat is accompanied by sensory abnormalities such as soreness, numbness, swelling, or pain. If the left side feels cold accompanied by soreness and distension, blood deficiency with cold congealing is often considered; if the right side feels hot accompanied by stabbing pain, qi stagnation transforming into heat is often considered. Simple functional differences tend to be more noticeable upon waking and diminish after activity—this suggests that qi and blood have not yet been fully "activated" and need moderate exercise to be awakened. Conversely, if symptoms persist unabated or even worsen, organic problems may be involved, and one should seek evaluation at a licensed medical institution rather than relying solely on TCM theory for self-treatment.
V. The Root of Mixed Cold and Heat: Insufficiency of Middle Qi and Qi Stagnation
When discussing mixed cold and heat patterns, the classical texts of TCM place great emphasis on the state of "middle qi." The Piwu Lun (Treatise on the Spleen and Stomach) states: "When the qi of the spleen and stomach is damaged, primordial qi cannot be replenished, and from this all diseases arise." The spleen and stomach reside in the center and serve as the pivot of ascending and descending. The spleen governs the ascending of clear yang, and the stomach governs the descending of turbid yin. If the spleen and stomach functions are weakened, clear yang fails to ascend and turbid yin fails to descend. Yang qi becomes blocked above, and cold pathogen remains below, naturally forming the pattern of upper heat and lower cold. On the other hand, the liver governs free flow and regulates the qi mechanism. When emotions are suppressed or stress is excessive over a long period, liver qi depression leads to qi movement disorder, causing uneven distribution of qi and blood and the simultaneous appearance of cold and heat. These two factors often intertwine: spleen deficiency aggravates liver depression, and liver depression further impairs spleen and stomach transportation and transformation, forming a vicious cycle.
Insufficiency of Middle Qi: A Breeding Ground for Coexisting Cold and Heat
To understand why insufficiency of middle qi can simultaneously produce abnormalities of cold and heat at both ends, one must start with the rules of qi movement. The forms of qi movement in the human body are nothing more than ascending, descending, exiting, and entering. When middle qi is insufficient, the force of yang qi ascending is weakened, and it cannot fully reach the distal ends of the limbs and the body surface, resulting in cold extremities. At the same time, the force of turbid yin descending is also weakened, and metabolic wastes and stagnant heat accumulate in the upper jiao, resulting in heat in the head and face. From this perspective, cold and heat are not two completely separate pathomechanisms but rather different projections of the same qi movement disorder at different locations in the body. This is precisely why simply using warming herbs to expel cold or cold-natured herbs to clear heat often only temporarily suppresses one extreme while overlooking the core issue of holistic recovery of the qi movement disorder.
Qi Stagnation: The Chain Reaction of Liver Qi Constraint
The liver's function of governing free flow can be likened to a flow regulator in a river. When the flow is blocked, the upstream may flood (stagnant heat) while the downstream may dry up (cold and coolness). People with liver qi depression often experience emotional depression, frequent sighing, and distension and fullness in the chest and hypochondrium. When qi stagnation persists over time, it transforms into fire, manifesting as irritability, bitter taste in the mouth, and red eyes—heat signs. However, qi stagnation simultaneously impedes the distribution of yang qi, causing the extremities, lower abdomen, and other areas to feel cold due to lack of warmth from qi and blood. This pattern of coexisting cold and heat, triggered by emotional fluctuations, is particularly pronounced in the premenstrual period of women. Clinically, the pulse in such individuals is often wiry and thin, the tongue body tends to be dark, or there may be ecchymoses or signs of engorgement on the sides of the tongue—the area traversed by the liver and gallbladder channels.
VI. From Classics to Daily Life: Four Self-Examination Points
1. Dietary Guidelines: Warming Foods as the Basis, Supplemented by Moistening and Cooling Foods
For individuals with coexisting cold and heat, the overall dietary direction should be mild and light. Neither excessive consumption of pungent, warming, and drying foods to "expel cold" nor indulgence in cold and raw items to "clear heat" is appropriate. This is because pungent, warming, and drying foods can make the upper body heat more pronounced, while cold and raw fruits and melons can aggravate cold congelation in the lower body. It is recommended to choose ingredients with neutral properties, such as Chinese yam (shanyao), lotus seeds, and figs, which can strengthen the spleen and boost qi without the risk of being too cold or too hot. If upper body heat is pronounced, one may appropriately consume some moistening and cooling foods such as pear, lily bulb, and white fungus, but always in moderation, observing the body's response before adjusting.
2. Sleep and Daily Rhythm: Guarding the Rhythm of Yang Qi Withdrawal and Storage
Most individuals with coexisting cold and heat share the common trait of irregular sleep schedules. Nighttime is the period when yang qi should be stored and yin qi takes over. If one stays up late, yang qi cannot descend and be stored, and it continues to float in the upper body, aggravating the heat manifestations above. Meanwhile, chronic sleep insufficiency depletes yin essence, further depriving the lower body of its source of warmth, thereby intensifying the cold manifestations. Therefore, a regular sleep-wake rhythm is not an optional recommendation for those with coexisting cold and heat—it is a fundamental prerequisite for rebalancing. No matter what other health measures are adopted, ensuring adequate nighttime sleep is the first priority. The ancients' wisdom of "rising at sunrise and resting at sunset" is precisely about aligning the ascending and descending of qi with the circadian rhythm.
3. Emotional Regulation: Soothing the Liver and Unblocking Qi to Get It Moving Again
Emotional states are closely related to the degree of qi stagnation. When liver qi is free and flowing, the qi mechanism circulates smoothly, and cold and heat return to their proper positions at both ends. When liver qi is constrained, qi movement becomes impaired, and the division of cold and heat intensifies. In daily life, one can try to relieve stress through reading, music, walking, and communication with friends and family. If one has been in a state of anxiety, anger, or suppression for a long time, it may be worthwhile to consider seeking professional psychological support. This itself is an important component of health regulation. From a TCM perspective, the goal of emotional regulation is not to suppress emotions but to allow them to flow naturally like river water and subside naturally, without generating pathology due to obstruction.
4. Exercise and Daoyin: Mild Sweating Is the Goal, Activating the Middle Jiao Pivot
Moderate exercise helps promote qi and blood circulation and restore the function of the middle jiao pivot, which is beneficial for individuals with coexisting cold and heat. However, it is important to note that exercise intensity should not be excessive; mild sweating is the reference standard. Profuse sweating, on the other hand, can consume qi and yin, tilting the balance of cold and heat even further. Gentle exercises such as walking, tai chi, and eight-section brocade (baduanjin) are more suitable for this constitution. It should be noted that the specific type and duration of exercise need to be individualized. If necessary, one may consult a licensed TCM practitioner to determine an appropriate exercise plan based on one's constitution. If one feels comfortable and mentally refreshed after exercise, the intensity is appropriate; if one feels exhausted, the amount has exceeded what the body can currently handle.
VII. Dietary and Lifestyle Recommendations for Mixed Cold and Heat Patterns
Dietary Principles: Avoid Raw and Cold Foods; Reduce Pungent and Spicy Foods
In terms of dietary principles, individuals with coexisting cold and heat need to pay special attention to two extremes: raw and cold foods congeal the qi mechanism, making the cold manifestations in the lower body more severe; pungent, hot, and drying foods fuel the fire in the upper body. In contrast, warming ingredients—such as fresh ginger, longan, beef, and lamb—can be consumed in moderation to help yang qi ascend, but care should be taken to pair them with some moistening and cooling ingredients to counteract their warming and drying nature. Among vegetables, root vegetables such as carrots, pumpkin, and potatoes have neutral properties and help strengthen the function of the middle jiao, making them suitable choices.
Herbal Teas and Medicated Foods: Choose a Single Ingredient
In daily care, one can choose some food-and-medicine homologous ingredients to steep in water individually. For example, if middle jiao deficiency cold is the main pattern, a few slices of fresh ginger with a little brown sugar in water can be used; if upper jiao stagnant heat is the main pattern, a few chrysanthemum flowers or a small handful of goji berries can be steeped. However, it should be noted that these are merely daily beverages and cannot replace medical treatment. When the manifestations of mixed cold and heat are complex and involve imbalances across multiple zang-fu organs, one should seek pattern identification and guidance from a licensed TCM practitioner rather than self-combining multiple herbs for long-term use. TCM emphasizes "use the corresponding formula only when the corresponding pattern is present." Without proper pattern identification, self-concocted combinations may be counterproductive.
Daily Living Details: Keep the Lower Back, Abdomen, and Feet Warm
From a daily living perspective, the areas most in need of protection for individuals with coexisting cold and heat are the lower back, abdomen, and feet. These two areas are precisely where kidney yang and spleen yang are stored, and they are also important passageways connecting the upper and lower qi mechanisms. If the lower back and abdomen are exposed to cold, spleen and kidney yang qi will be damaged, the operation of the middle jiao pivot will become even more sluggish, and the division of cold and heat will further intensify. In an air-conditioned room, one may prepare a thin blanket to protect the lower back and abdomen. In winter, warm socks and shoes are necessary to avoid "cold generating from the feet." At the same time, indoor temperature should not be too high or too low, so as not to aggravate the temperature difference stress between the upper and lower or left and right sides of the body.
Sleep Rhythm Adjustments: Quiet Nurturing in the Evening
The evening is the time when yang qi undergoes storage and hiding. Individuals with coexisting cold and heat should adopt a quiet and restorative tone in the evening. Avoid vigorous exercise or sustained exposure to stimulating visual content before bed, as these can cause yang qi to float upward and make it difficult to settle into yin. Before sleep, soaking the feet in warm water—at a comfortable temperature—can help qi and blood descend. However, foot soaking is not suitable for everyone. Those with lower limb venous issues or underlying cardiovascular diseases should consult a physician first. Bedtime should be regular, ideally falling asleep before a fixed time in the evening, so that the body's rhythm becomes predictable.
Self-Observation: Learning to Notice the Body's Subtle Responses
Health maintenance is not about pursuing a fixed "standard temperature" but about learning to observe how the body responds in different situations. Individuals with coexisting cold and heat may pay attention to several specific questions: When the body feels cold, do the hands and feet get cold first, or does the back feel cold first? When the upper body feels hot and dry, is it a furrowed brow, or is it chest tightness accompanied by sweating? After eating warm foods, does a sensation of warmth spread toward the limbs, or does heat in the head intensify? After activity, does the difference between cold and heat diminish or increase? There are no uniform answers to these questions, but each observation helps you understand your body's qi movement patterns more clearly. You might consider keeping a simple journal, noting the time, context, and physical feelings each time cold or heat changes occur. After accumulating observations over time, reviewing them often reveals patterns unique to you—this is precisely the starting point of TCM's principle of "treatment tailored to the individual."
Have you ever considered that one side of your body feeling cold while the other feels hot might not merely be a misperception of temperature? It may be a signal from the qi mechanism within, reminding us to re-examine our daily rhythms, emotional patterns, and dietary habits. As the Suwen (Plain Questions) states: "When yin is calm and yang is secure, the spirit is in harmony." When yin and yang no longer operate in isolation, cold and heat will naturally return to their proper positions.
References:
1. The original text of the Huangdi Neijing · Suwen can be consulted in the TCM Classics Literature Database: https://tcmdata.cintcm.com/
2. WHO Strategic Document on Traditional Medicine: https://www.who.int/health-topics/traditional-complementary-and-integrative-medicine
3. Official Website of the National Administration of Traditional Chinese Medicine: https://www.satcm.gov.cn/
Related Q&A
1. What causes the secret of coexisting cold and heat in the body?
In TCM, the secret of coexisting cold and heat requires a holistic pattern differentiation approach, integrating the four diagnostic methods (inspection, auscultation-olfaction, inquiry, and palpation) combined with individual constitution characteristics for a comprehensive judgment. It cannot be generalized. The direction of regulation should be determined by a licensed TCM practitioner after an in-person consultation.
2. How long is the treatment course for upper heat and lower cold?
The treatment course varies from person to person and is related to factors such as individual constitution, lifestyle habits, and compliance. TCM emphasizes gradual progress. The specific course should be assessed by a licensed TCM practitioner after an in-person consultation based on individual circumstances. This material does not provide specific course commitments.
3. What should be noted in daily life for true cold with false heat and true heat with false cold?
For daily care, it is recommended to maintain regular sleep, a balanced diet, moderate exercise, and emotional stability. Specific precautions should be flexibly adjusted according to individual constitution and seasonal changes. One may consult a licensed TCM practitioner for targeted advice.