Women's hair loss usually has a cause that can be found, and often more than one at once. That's why a shampoo or oil alone rarely fixes it. Work out the likely cause, get the right tests, then treat it.
Step 1: When did it start, and what does it look like?
| What you notice | Possible cause | Go to |
|---|---|---|
| Lots of hair falling 2–4 months after delivery | Post-delivery shedding (usually temporary) | Hair fall after delivery |
| Sudden heavy shedding 2–3 months after fever, typhoid, dengue, COVID, surgery, crash dieting or a stressful event | Telogen effluvium | Telogen effluvium |
| Widening parting, thinner ponytail, scalp showing on top; front hairline stays | Female pattern hair loss | Female pattern hair loss |
| Hair thinning plus irregular periods, acne, facial or body hair, weight gain | PCOS (high androgens) | PCOS hair loss |
| Thinning plus tiredness, feeling cold, weight change, dry skin | Thyroid problem | Thyroid hair loss |
| Thinning plus tiredness, breathlessness, heavy periods, vegetarian diet | Low iron (ferritin) | Iron deficiency |
| Round smooth bald patches | Alopecia areata | Alopecia areata |
| Itchy, flaky scalp | Dandruff or seborrhoeic dermatitis | Dandruff and hair fall |
| Breakage, not roots; hair snaps mid-length | Damage from heat, colouring or tight hairstyles | Hair damage and breakage |
Not sure? → Take the 2-minute cause finder
Tests worth asking your doctor about
Your doctor will decide what you need, but these are commonly checked for women's hair loss.
- Complete blood count (CBC) and serum ferritin for anaemia and iron stores. Ferritin can be low even when haemoglobin is normal.
- TSH for thyroid function.
- Vitamin D and vitamin B12, especially if you're vegetarian.
- If you have PCOS signs: hormone tests such as total or free testosterone and DHEA-S, timed with your cycle as your doctor advises.
- Stop biotin supplements a few days before blood tests. High doses can distort some results, including thyroid tests.
What helps (by cause)
| Cause | First-line approach | Evidence |
|---|---|---|
| Female pattern hair loss | Minoxidil (2% twice daily or 5% foam once daily) | Strong |
| PCOS / high androgens | Treat the PCOS with your doctor; spironolactone or other anti-androgens on prescription; minoxidil | Moderate |
| Low iron, thyroid, vitamin D | Correct the deficiency under a doctor; hair usually recovers in 3–6 months after levels improve | Moderate |
| Post-delivery / telogen effluvium | Mostly reassurance and nutrition; it usually settles within 6–12 months | Natural history |
| Alopecia areata | Dermatologist treatment (steroid injections, creams, newer medicines) | Strong for several options |
Important for women:
- Finasteride and dutasteride are generally not for women who are pregnant or could become pregnant. They can harm a male foetus.
- Minoxidil 5% can cause unwanted facial hair in some women. It usually goes away after stopping. → Minoxidil side effects
- Pregnant or breastfeeding? Don't start minoxidil or any anti-androgen. Talk to your doctor.
What doesn't fix the cause
Oils, onion juice, hair masks and "anti-hair-fall" shampoos can make hair look and feel better. They can't correct low iron, PCOS or thyroid disease. Use them for comfort, not as treatment. → Shampoos scored
See a doctor soon if you have: round bald patches that appear suddenly · hair coming out in clumps · redness, pain, pus, scaling or scarring on the scalp · hair loss with fever, weight loss, irregular periods, acne or new facial hair · eyebrow or eyelash loss · hair loss in a child.
Sources
- Lucky AW, et al. A randomized, placebo-controlled trial of 5% and 2% topical minoxidil solutions in the treatment of female pattern hair loss. J Am Acad Dermatol. 2004;50:541–53.
- Blume-Peytavi U, et al. A randomized, single-blind trial of 5% minoxidil foam once daily versus 2% minoxidil solution twice daily in the treatment of androgenetic alopecia in women. J Am Acad Dermatol. 2011;65:1126–34.
Medical review pending: not yet reviewed by a dermatologist. Medical disclaimer
Discussion
Share your experience or ask a question. New members' posts are reviewed before they appear.