Have you ever noticed, while brushing your teeth in the morning, that when you unconsciously curl up your tongue, you can see two thin purplish-blue vessels on either side beneath it? They should normally be faintly visible and light purple in color. But if you have recently been feeling a sore, aching lower back, as though there were no bones inside to support it, with your whole body sagging downward, and even sitting up straight feels exhausting, then it may be worth looking down to check—have these two "blue veins" become thicker and darker, like two winding little snakes? In traditional Chinese medicine (TCM) clinical practice, the sublingual collateral vessels are a window for observing the flow of qi and blood, and changes in them are often inextricably linked to the supporting strength of the lower back.
Starting with "Goji Berry": Tonifying the Liver and Kidney, Nourishing the Foundation of the Lower Back
For lower back soreness and weakness, traditional Chinese medicine often thinks first of liver and kidney deficiency. The Huangdi Neijing states: "The waist is the residence of the kidney; when one cannot turn or shake, the kidney is about to fail." This sentence highlights the close relationship between the waist and the kidney. The kidney stores essence and governs the bones and marrow; the liver stores blood and governs the sinews and bones. The strength of the lower back requires both the nourishment of kidney essence and the moistening of liver blood. Goji berry, neutral in nature and sweet in flavor, enters the liver and kidney meridians, and is often regarded in TCM clinical practice as one of the commonly used food ingredients for nourishing the liver and kidney. It is moistening in texture and can tonify the yin of the liver and kidney, offering some help for soreness and weakness of the lower back and knees caused by liver-kidney yin deficiency.
Among people who work at a desk for long periods and frequently stay up late, lower back soreness accompanied by dry eyes, dizziness, and tinnitus is relatively common. This type of state often belongs to a presentation of insufficient liver-kidney yin and blood. Soaking goji berries in water, cooking them in congee, or pairing them with a small amount of chrysanthemum can serve as one of the daily maintenance methods. However, if the tongue coating is thick and greasy and the stool is sticky and sluggish, this indicates that dampness may be relatively heavy in the body. Using goji berries alone in that case can easily be cloying and rich, hampering the stomach, so dampness should be resolved first before tonifying.
Closely related to the liver and kidney is also the Shenshu acupoint in the lower back region. Shenshu, also known as Gaogai, is located 1.5 cun lateral to the lower border of the spinous process of the second lumbar vertebra, belongs to the Foot Taiyang Bladder Meridian, and is the back-shu point of the kidney. Back-shu points are acupoints where the meridian qi of the zang-fu organs is infused into the back. The area where Shenshu is located is precisely where kidney qi gathers, and in TCM theory it is often used as one of the reference points for observing the rise and decline of kidney qi.
Next, "Chinese Yam": Tonifying the Spleen and Securing the Kidney, Supporting the Middle Qi
In addition to being related to the liver and kidney, lower back soreness also cannot ignore the function of the spleen and stomach. The spleen governs the muscles and governs the transportation and transformation of water and grain essences, and is the source of the generation and transformation of qi and blood. The reason the lower back can support the body depends on the firmness of the muscles and the fullness of qi and blood. If the spleen is deficient and transportation and transformation lack strength, the muscles lose nourishment, and the lower back will feel loose and weak, like a balloon from which the air has been let out. Chinese yam, neutral in nature and sweet in flavor, enters the spleen, lung, and kidney meridians, and can both tonify the spleen and nourish the stomach, as well as benefit the kidney and secure essence.
Clinically, some people experience lower back soreness along with poor appetite, loose or thin stools, and abdominal bloating after meals. This suggests that the spleen and stomach's transportation and transformation function is relatively weak, and the generation and transformation of qi and blood is insufficient, making it impossible to transport upward to the lower back to maintain supporting strength. Chinese yam is mild in nature, neither cold nor dry, and can be cooked into soup with euryale seed and lotus seed as an auxiliary method for regulating the spleen and stomach. However, it should be noted that although Chinese yam has an astringent nature, if constipation is obvious, it should not be consumed in large amounts, so as not to worsen difficult bowel movements.
The Compendium of Materia Medica records that Chinese yam "benefits kidney qi, strengthens the spleen and stomach, stops diarrhea and dysentery, transforms phlegm and drool, and moistens the skin and hair." This shows its wide range of uses.
Skillful Use of "Eucommia Bark": Guiding Qi Back to the Waist, Warming and Unblocking the Meridians
When discussing lower back soreness, Eucommia bark is an herb that cannot be avoided in TCM clinical practice. Eucommia bark is warm in nature and sweet in flavor, enters the liver and kidney meridians, and traditional Chinese medicine holds that it has the effects of tonifying the liver and kidney and strengthening the sinews and bones. Its characteristic lies in its ability to guide qi and blood downward, directly reaching the lower back, like a guide leading the body's qi and blood energy to the place where it is most needed. For lower back soreness and cold pain caused by kidney deficiency and cold congelation, or by obstruction of the meridians in the lower back, Eucommia bark is often selected.
Eucommia bark can be used in decoctions, or stewed together with pig kidney, taking the meaning of "treating form with form." However, it should be noted that Eucommia bark is warm in nature. If lower back soreness is accompanied by dry mouth and throat, heat in the palms and soles, and night sweats due to yin deficiency with hyperactive fire, it should not be used alone and needs to be combined with yin-nourishing ingredients. In addition, Eucommia bark has a fetus-calming effect, and pregnant women may use it in appropriate amounts under a physician's guidance, but non-pregnant individuals should also not use it in excess.
The Shennong Bencao Jing lists Eucommia bark as a superior-grade herb, stating that it "mainly treats pain of the lower back and spine, tonifies the center, benefits essence and qi, strengthens the sinews and bones, and strengthens the will."
In TCM meridian theory, one of the most commonly mentioned acupoints in the lower back region is Weizhong. Weizhong is located at the midpoint of the popliteal crease, belongs to the Foot Taiyang Bladder Meridian, and is the he-sea point of the Bladder Meridian. The Bladder Meridian runs through the lower back, hence the saying "for the lower back and spine, seek Weizhong," meaning that Weizhong acupoint is closely related to the condition of the lower back and spine, and is often used to observe whether the qi and blood of the lower back and spine are flowing smoothly.
Combination Suggestion: Goji Berry, Chinese Yam, and Eucommia Bark Soup, Gentle Nourishment
Combining goji berry, Chinese yam, and Eucommia bark is a gentle daily maintenance method. Take an appropriate amount of Chinese yam, peel and cut into pieces, briefly rinse Eucommia bark with clean water, and place together with goji berries into a pot, add water, and simmer slowly. The warming and unblocking nature of Eucommia bark, the spleen-tonifying nature of Chinese yam, and the yin-nourishing nature of goji berry work together to address both the liver and kidney as well as the spleen and stomach. But remember, this is not a prescription, but a combination of food ingredients suitable for some people. The specific dosage and frequency need to be determined by a licensed TCM physician based on individual constitution and tongue and pulse conditions.
Behind Lower Back Soreness: Treating the Same Disease with Different Methods, Not to Be Generalized
The causes of lower back soreness are not only deficiency patterns. Clinically, lower back soreness is also commonly seen in people with heavy dampness and blood stasis obstruction. For example, people who sit for long periods with little movement, are somewhat overweight, and have a white greasy tongue coating may have damp turbidity drowsy obstructing the meridians of the lower back, with unsmooth movement of qi and blood. In such cases, the need is instead to resolve dampness and unblock the collaterals, rather than simply warming and tonifying. In addition, if the lower back has previously suffered trauma, or if poor posture has been maintained for a long time, causing local qi and blood stasis, soreness, distention, and pain may also appear. In such situations, pressing the lower back often reveals a fixed tender point, and the tongue body tends to be dark or have stasis spots. The direction of regulation is mainly to invigorate blood and move qi, which is very different from tonifying methods.
Therefore, for the same lower back soreness, some people are suited to warming and tonifying, some need clearing and draining, some need to resolve dampness, and some need to invigorate blood. This is precisely the essence of TCM's "treating the same disease with different methods." Blindly following one's feelings or copying others' methods may produce the opposite effect.
When Lower Back Soreness Cannot Support the Body, Perhaps the Body Is Reminding You
When lower back soreness reaches the point where it feels impossible to support the body, besides being a reflection of zang-fu organ function, it may also be a warning about lifestyle habits. Prolonged sitting, lack of exercise, insufficient sleep, and suppressed emotions will all slowly consume qi and blood and damage the sinews and bones. TCM theory points out that the body's essence, qi, and spirit are a whole, and the supporting strength of the lower back is not only a matter of sinews, bones, and muscles, but also the result of the coordinated work of the five zang and six fu organs. When the lower back sends out this signal, it may be worth first examining your own daily routine and emotions.
If you find that your sublingual collateral vessels are purplish-blue, your tongue body is dark, and your lower back soreness is accompanied by cold hands and feet, this may tend toward cold congelation and blood stasis; if the tongue coating is yellow and greasy, with dry mouth and bitter taste, it may be damp-heat pouring downward. All of these require a licensed TCM physician to make a comprehensive judgment through inspection, listening and smelling, inquiry, and palpation. The better approach is to consult a licensed medical institution and let a professional perform syndrome differentiation for you, then formulate a regulation plan suitable for you.
In addition, Taixi, the yuan-source point of the Foot Shaoyin Kidney Meridian, is also worth understanding. Taixi is located in the depression between the tip of the medial malleolus and the Achilles tendon, and is the yuan-source point of the Kidney Meridian. Yuan-source points are the sites where the body's original qi stays, and Taixi can reflect whether kidney qi is sufficient. In many discussions about kidney qi insufficiency, Taixi is an important reference acupoint.
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Frequently Asked Questions
Q: Are lower back soreness and kidney deficiency the same thing?
A: Not exactly. In traditional Chinese medicine, the "kidney" is a functional system encompassing reproduction, growth, bones, water metabolism, and many other aspects. Lower back soreness can be a manifestation of kidney deficiency, but it may also be caused by dampness, blood stasis, spleen deficiency, and other reasons. It needs to be judged comprehensively in combination with other symptoms and the tongue and pulse.
Q: Why do some people benefit from goji berries for lower back soreness, while others feel worse the more they eat?
A: This is related to constitution. Goji berries tend to be cloying and rich, and are suitable for people with a yin-deficient constitution. If there is dampness or phlegm turbidity in the body, using goji berries may instead aggravate dampness stagnation, leading to abdominal bloating and a thicker tongue coating. Therefore, before using any food ingredient, it is better to first clarify your own constitutional state.
Q: Both Eucommia bark and achyranthes root treat lower back soreness. What is the difference?
A: Eucommia bark tends to be warm and focuses on tonifying the liver and kidney and strengthening the sinews and bones, and is especially suitable for people with sore, cold, and painful lower back who fear cold. Achyranthes root is neutral in nature and can guide blood downward and invigorate blood and unblock menstruation, making it more suitable for lower back soreness accompanied by heaviness in the lower limbs or blood stasis pain. The two have different emphases and cannot replace each other.
Q: Can lower back soreness be relieved by massage?
A: Appropriate massage of the muscles in the lower back can relax the local area and promote the flow of qi and blood, and offers some help in relieving fatigue. But if the lower back soreness is caused by zang-fu deficiency or sinew and bone problems, massage can only provide temporary relief and cannot solve the root cause. Regulation needs to start from the internal aspect.