Read this first
When to worry
Hair loss is not an emergency, and the useful question is whether it is scarring or not. Scarring alopecia destroys the follicle permanently, so delay costs hair that will not return. The rest of this section is about separating the types before anything is treated.
Get help now — same day or emergency
- Patchy hair loss with redness, scaling, pustules or pain on the scalp. This can be a scarring alopecia, and it needs a dermatologist urgently rather than eventually.
- Hair loss with fever, a widespread rash and joint pain. Systemic lupus and other connective tissue diseases present this way and need same-week assessment.
- Sudden shedding with profound fatigue, breathlessness or palpitations — severe anaemia or thyroid disease, and both need blood tests rather than a supplement.
- A painful swelling or pus-filled area on the scalp, with fever. A scalp abscess needs draining, and delaying it can destroy the follicles over it.
Get it looked at within days
- Smooth, round, completely bald patches with a normal-looking scalp. Alopecia areata is the usual diagnosis; it often regrows on its own but a dermatologist should confirm it, and it is not a pattern problem.
- A scalp that has become smooth and shiny, with no visible follicle openings, in an area that used to have hair. This is the appearance of scarring, and it is the one presentation where waiting is the wrong choice.
- Diffuse thinning with fatigue, feeling cold, constipation or heavy periods — thyroid and iron studies, both of them.
- Thinning with irregular periods, acne and unwanted facial hair. Polycystic ovary syndrome is assessed, not assumed.
- Shedding that began within three months of childbirth, a severe illness, major surgery, a crash diet or a new medicine. Telogen effluvium is the usual explanation and it recovers, but the trigger is worth identifying.
Two blood tests do most of the work in diffuse thinning: ferritin and thyroid function. Ferritin is the one most often skipped — a level that is "within range" can still be low enough to drive shedding in some people, and the number matters more than the flag. Neither test tells you anything about a pattern.
One rule for this whole list: if you are not sure whether a line applies to you, treat it as though it does — and get it checked. Uncertainty is a reason to be seen, not a reason to wait.
Three kinds of hair loss
The traditional account reads hair as an outgrowth of blood and essence, which makes diffuse thinning legible and makes patches much less so. The three presentations below are separated by what the scalp looks like, not by how much hair is gone.
Diffuse thinning all over
The whole head thins, the part line widens, hair feels dry and brittle, nails split, and there is tiredness, pallor or a long history of light periods.
Points to Read as blood or essence not reaching the surface. This is the presentation where the classical reasoning maps onto something checkable — iron, thyroid, protein intake, months of poor sleep.
Receding hairline or a thinning crown
A defined pattern rather than a general thinning: temple recession, a widening crown, a healthy-looking scalp elsewhere, often a family history.
Points to Read traditionally as damp or blood heat rising to the head, but honestly this is where the tradition is weakest. Pattern treatment changes little, and pretending otherwise costs the person a year.
Smooth round patches
One or several sharply defined bald patches, the skin looking normal or faintly pink, sometimes with pitting of the nails, occasionally spreading to the eyebrows or beard.
Points to Called 油风 in the traditional literature and read as blood deficiency generating wind, or as blood stasis. The reading exists; the evidence that treating it changes the course does not. See a dermatologist, and treat any pattern work as an adjunct at most.
What the patterns describe
Hair is the one part of this site where the classical account and modern medicine are furthest apart, and it is worth saying so plainly. The tradition reasons from the outside in: hair is the surplus of blood, the outward flowering of the kidney, and dryness or loss is read as a failure of supply or an excess of heat. That reasoning is elegant, it is internally consistent, and it produces a plausible treatment direction for diffuse thinning in a person who is also pale, tired and sleeping badly. It produces much less for a 28-year-old man with temple recession and no other sign of anything.
The distinction that matters practically is scarring versus not. A scalp that has lost its follicle openings is not going to grow hair back under any treatment, and every week spent on supplements is a week of permanent loss. That is why the first question on this page is about the appearance of the scalp rather than about the pattern, and why the second is about blood tests rather than about herbs. Diffuse thinning has real, findable causes — iron, thyroid, protein, months of illness or grief — and finding them is worth more than any formula.
Where pattern work does earn its place is in the person whose thinning is part of a larger picture: pale, tired, cold hands, light periods, brittle nails, thin pulse. That person has blood deficiency by the classical criteria, and the same treatment direction that addresses the hair addresses the fatigue and the periods. It is a coherent whole. What it is not is a cure for hereditary hair loss, and no honest reading of the tradition claims it is.
Which patterns it belongs to
These are the patterns this symptom is conventionally grouped under. They are not competing diagnoses — most people meet one, and the point of the list is to show you which questions separate them.
Pale complexion, pale lips and nail beds, thin pulse, tiredness, light periods, dry skin and brittle nails.
The standard reading for diffuse thinning with pallor and fatigue.
Read the pattern page →Dry mouth at night, night sweats, five-palm heat, sore lower back, a red tongue with little coat, a thin rapid pulse.
Thinning with dryness and heat — often in the years around the menopause.
Read the pattern page →Greasy hair and scalp, itching or pustules along the hairline, a sticky mouth, a greasy tongue coat, a slippery rapid pulse.
Thinning with an oily scalp, itching and crusting.
Read the pattern page →Irritability or low mood that tracks stress, distension under the ribs, sighing, a wiry pulse, worse sleep in the same weeks.
Shedding that tracks a period of sustained stress rather than a change in the scalp.
Read the pattern page →The signs behind it
Each line below is one entry in the sign table — the same table the self-check draws its follow-up questions from. The tier says how strongly that sign points at the pattern: a defining sign is expected, a common one is usual, a supporting one is optional.
- Dry skin, brittle nails or thinning hair Blood deficiencycommon ·Kidney yin deficiencysupporting ·Kidney yang deficiencysupporting ·Liver yin deficiencysupporting
- Pale complexion Blood deficiencydefining ·Qi deficiencycommon ·Spleen qi deficiencysupporting
- Pale lips and nail beds Blood deficiencydefining ·Qi deficiencycommon
- Thin pulse Blood deficiencydefining ·Kidney yin deficiencycommon ·Qi deficiencycommon ·Liver yin deficiencycommon ·Kidney yang deficiencysupporting
- Dry eyes or blurred vision Liver yin deficiencydefining ·Blood deficiencycommon ·Kidney yin deficiencycommon ·Liver yang risingcommon
Not every sign listed here will apply to you — a sign only counts alongside the others. The self-check is the place to weigh them against your own answers.
Telling them apart
Four questions do most of the work. Each one splits the field in half, and after two or three the pattern is usually clear enough to act on — or clear enough to know that the answer is medical rather than traditional.
| Question | If yes | If no |
|---|---|---|
| Is the scalp smooth and shiny, or does it look normal? | Smooth, shiny, no follicle openings → scarring is possible. This is the one answer that should stop the pattern discussion and send you to a dermatologist. | Normal-looking scalp → the pattern question is reasonable after blood tests. |
| Is the loss diffuse, patterned, or in patches? | Patches → alopecia areata is the usual diagnosis, and it is not a blood-deficiency problem. | Diffuse → look for a supply problem; patterned → look at family history and hormones. |
| Have you had ferritin and thyroid function checked? | No → do that before anything else. It is two blood tests and it changes the plan more often than any supplement. | Yes, and both are normal → the pattern work is the reasonable next step. |
| Did the shedding start after an event — birth, illness, surgery, a diet, a new medicine? | Yes, within about three months → telogen effluvium is likely and it usually recovers on its own. Do not treat it aggressively. | No clear trigger, gradual over a year or more → this is the presentation where pattern reading has the most to offer. |
What you can do at home
None of this treats a named condition, and none of it replaces assessment. These are the ordinary measures attached to this symptom — low risk, and worth doing while you work out what is actually going on.
- Get ferritin and thyroid function measured before buying anything. Both are cheap, both are commonly abnormal, and neither can be guessed from symptoms with any reliability.
- Count the protein in an ordinary day. Diffuse shedding after a crash diet or a long stretch of inadequate intake is common, and it reverses when the intake does.
- Do not treat patches as a deficiency. Rubbing tonics into a smooth patch does nothing and delays the assessment that might matter.
- Photograph the same patch or the same part line under the same light on the first of each month. Hair changes are too slow to judge by feel, and a photograph settles arguments about whether something is working.
- Gentle handling matters less than it is usually given credit for, and aggressive shampoos, tight styles and heat do matter — traction and styling are real contributors, particularly at the hairline.
Classical sources
Quoted in the original, with our own translation and the chapter it comes from. We do not reproduce existing English translations — they are someone else's reading.
五八，肾气衰，发堕齿槁。 wǔ bā, shèn qì shuāi, fà duò chǐ gǎo
At five eights the kidney qi declines, the hair falls and the teeth become dry.
肾者，主蛰，封藏之本，精之处也，其华在发，其充在骨。 shèn zhě, zhǔ zhé, fēng cáng zhī běn, jīng zhī chù yě, qí huá zài fà, qí chōng zài gǔ
The kidney governs storage; it is the root of sealing and keeping, the place where essence resides. Its flower is in the hair, its fullness in the bones.
肾之合骨也，其荣发也。 shèn zhī hé gǔ yě, qí róng fà yě
The kidney pairs with the bones, and its outward glory is the hair.
All three lines are about the ageing arc rather than about treatment, and the tradition read them that way too. The classical formulas for hair loss include several containing minerals at doses that are not safe to take unsupervised, and one of the most cited — he shou wu — is hepatotoxic in a minority of people. Nothing on this page is a recommendation to take it.
Terms used on this page
One concept, several names. The standard term comes first; pinyin and characters are there so you can search and cross-check; older aliases are what you will meet in other people's writing.
| Standard term | Pinyin | 中文 | Also written as |
|---|---|---|---|
| Hair loss | tuō fà | 脱发 | alopecia; 发为血之余 (hair as the surplus of blood) |
| Alopecia areata | yóu fēng | 油风 | patchy hair loss, historically 鬼剃头 (ghost-shave) |
| Kidney’s flower is the hair | qí huá zài fà | 其华在发 | the kidney manifests in the hair |
| Scarring alopecia | bā hén xìng tuō fà | 疤痕性脱发 | cicatricial alopecia |
Check your own pattern
Hair loss is a symptom, and symptoms appear in several patterns. The self-check weighs twelve questions against all twelve patterns and shows you what fits — and what doesn't quite.
Start the self-checkAbout four minutes. No account, nothing stored on a server, and an address for the printable report is optional.