In the consultation room, a young man sat down rubbing his eyes, saying they were as red as a rabbit's, tearing up at the sight of light, and only comfortable when closed. He pulled up a photo on his phone: "Is this just 'shanghuo' (excess internal heat)? I've been drinking chrysanthemum tea for three days—why isn't it getting better?" This confusion is something many people have experienced. Are red eyes, bloodshot vessels, and photophobia really as simple as "shanghuo"? In traditional Chinese medicine (TCM), pattern differentiation is far more complex than the two words "shanghuo."
Where Does This "Fire" Come From?
Red eyes with bloodshot vessels are often categorized in TCM as a manifestation of "fire." But this fire may originate from the liver, from the lungs, or even from yin deficiency. If one simply uses bitter-cold, heat-clearing chrysanthemum, it may help those with liver fire excess, but for those with lung heat or yin deficiency, it could actually make matters worse.
Clinically, this group of patients often shares a common trait: prolonged late nights, excessive eye use, or a diet lean spicy and greasy foods. The eyes are the "orifice of the liver," as the liver opens into the eyes. When liver fire flares upward, the eyes easily become congested. But the signal of photophobia suggests the problem may run deeper—the liver stores blood, and when blood is deficient, the eyes lose their nourishment, becoming intolerant to light stimulation.
Speaking of liver fire, one cannot fail to mention Taichong (LR3) on the liver meridian. Taichong, also known as Dachong, is located on the dorsum of the foot, in the depression anterior to the junction of the first and second metatarsal bones. It belongs to the Foot Jueyin Liver Meridian and serves as the Shu-stream and Yuan-source point of the liver meridian. Yuan-source points are where the original qi of the zang-fu organs passes through and remains; Taichong is closely related to the liver's function of governing free flow of qi. The Lingshu: Jiu Zhen Shi Er Yuan records that "when the five zang organs have diseases, one should select from the twelve yuan-source points," demonstrating its important role in regulating liver qi.
Is Photophobia "Heat" or "Deficiency"?
Photophobia has two common interpretations in TCM. One is true excess heat, such as liver fire flaming upward, where the fire is fierce and light feels like a knife. The other is deficiency heat or blood deficiency, where the eyes lack moisture and become sensitive and fragile.
How to distinguish? Look at the overall state. If the eyes are severely red, with excessive discharge, dry mouth and bitter taste, and irritability, it is most likely liver fire excess heat. If the redness is not very pronounced but the eyes are dry, photophobic, easily fatigued, with hot palms and soles at night, it may be yin deficiency with fire flaring. Different directions require different approaches to regulation.
Among the acupoints around the eyes, Jingming (BL1) is traditionally closely associated with eye diseases. Jingming, also known as Leikong or the inner canthus, is located on the face, in the depression slightly above the inner canthus. It belongs to the Foot Taiyang Bladder Meridian and is the meeting point of five meridians: the hand and foot Taiyang, foot Yangming, yin qiao, and yang qiao vessels. Ancient medical texts call it the "convergence of all meridians," and it is frequently mentioned in the pattern differentiation of ophthalmic conditions, reflecting the connection between multiple meridians and the eye orifice.
Bloodshot Vessels: "Stasis" or "Heat"?
When blood vessels are densely distributed, TCM examines the state of "blood." Heat can force blood to move recklessly, causing blood vessels to dilate and congest; stasis can also impede blood circulation, causing it to stagnate and form vessels. Clinically,simply clearing heat may not necessarily eliminate bloodshot vessels, because blood stasis needs to be "transformed."
For those who wear contact lenses for long periods or stare at screens for extended hours, the qi and blood circulation around the eyes is already prone to stagnation. At this point, the bloodshot vessels are more like a product of "stasis" rather than a direct manifestation of "heat." If one blindly uses cold and cooling herbs, it may actually cause qi and blood to congeal further, making the bloodshot vessels even harder to resolve.
Xuehai (SP10) is an acupoint often mentioned in TCM when understanding the state of the blood aspect. Xuehai, also known as Baichongke, is located on the medial aspect of the thigh, 2 cun above the medial end of the base of the patella, at the bulge of the medial head of the quadriceps femoris. It belongs to the Foot Taiyin Spleen Meridian. The spleen is the source of qi and blood production, and Xuehai is where the blood generated by the spleen meridian gathers, closely related to the fullness and movement of "blood." The Zhen Jiu Da Cheng records that it can regulate "all blood diseases," making it a commonly referenced acupoint for understanding blood stasis, blood deficiency, and other pathomechanisms.
Why Does Chrysanthemum Tea Not Work for Some People?
Chrysanthemum can indeed clear the liver and brighten the eyes, but it is cold and cooling in nature. For those with spleen-stomach deficiency cold, drinking too much can actually harm the stomach. More importantly, chrysanthemum primarily targets "liver fire flaming upward" type of red, swollen, and painful eyes. If the problem lies in lung heat, yin deficiency, or blood stasis, chrysanthemum is powerless.
Clinically, red eyes with bloodshot vessels and photophobia are mostly seen in the following three constitutional types: first, liver fire excess type, often accompanied by headache and bitter taste; second, yin deficiency with fire flaring type, often accompanied by dry mouth and night sweats; third, lung heat congestion type, often accompanied by cough and sore throat. Each constitution requires a different focus in regulation.
Daily Care: Start with "Reducing the Burden"
Before seeking pattern differentiation from a licensed TCM practitioner, there is one thing you can do first: "reduce the burden" on your eyes. Reduce continuous eye use, looking into the distance every 20 minutes. Avoid direct strong light; wearing sunglasses can help. In terms of diet, spicy, fried, and grilled foods will fuel the "fire"—temporarily reduce them.
When photophobia is severe, try closing the eyes to rest, and gently apply a warm towel to the eyes to promote local qi and blood circulation. However, note that if accompanied by severe eye pain, sudden vision loss, or abnormally increased discharge, promptly visit a licensed medical institution for examination to rule out other ophthalmic diseases.
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Frequently Asked Questions
Q: What is the difference between bloodshot eyes and conjunctivitis?
TCM and Western medicine have different perspectives. Conjunctivitis is a Western medical diagnosis referring to inflammation of the conjunctiva; TCM looks at the overall state, where bloodshot vessels may be a manifestation of liver fire, lung heat, or blood stasis, and requires assessment combined with systemic symptoms.
Q: Why do some people with red eyes use heat-clearing herbs while others use warming and tonifying herbs?
This is what TCM calls "treating the same disease with different methods." For the same red eyes, if it belongs to liver fire excess heat, one uses herbs to clear the liver and drain fire; if it belongs to yin deficiency with deficient fire, one needs to nourish yin and descend fire; if it belongs to deficient yang floating upward, one should instead use warming and tonifying methods to guide the fire back to its origin. Without pattern differentiation, it is difficult to discuss efficacy.
Q: Is photophobia always related to the liver?
Not necessarily. Photophobia is related to the sensitivity of the "eyeball." TCM holds that "the essential qi of the five zang and six fu organs all ascend to infuse the eyes," so dysfunction of any zang-fu organ may affect the eyes. Clinically, liver-kidney yin deficiency, lung heat, and spleen-stomach accumulated heat can all lead to photophobia.
Q: If bloodshot eyes persist for a long time, should I be concerned?
If they persist for a long time without obvious triggers, it is advisable to consult a licensed TCM practitioner for pattern differentiation based on tongue and pulse. It may be a chronic state of poor qi and blood circulation, or it may indicate deeper issues such as liver qi stagnation or blood stasis. Avoid long-term self-administration of heat-clearing medications.