TL;DR
- Five main causes of hair loss in Indian patients: genetics, stress (telogen effluvium), nutritional deficiency, thyroid disease, scalp conditions.
- Three signs it is genetic: matches Norwood/Ludwig pattern, family history, slow 12-month progression.
- Three signs it is reversible: sudden diffuse shedding after stressor, even thinning, new growth at 3-6 months.
- Cause-first protocol: blood panel + trichoscopy at consult — fixes nutritional and thyroid causes before any surgery.
- 12-month rule: try medical management for at least 12 months before considering hair transplant surgery.
Hair loss has many causes — and the right treatment depends entirely on which one is yours. The biggest mistake patients make is jumping to “I need a hair transplant” before identifying the underlying cause. At Curls n Crowns in Chhatrapati Sambhajinagar (Aurangabad), Dr. Prashant Raktade runs a structured cause-first workup at every first consult, because treating telogen effluvium with surgery wastes ₹1.5 lakhs and donor hair — and treating androgenetic alopecia with shampoo wastes 12 months. This guide walks you through every common cause, how to identify it, and what works.
Cause 1 — Androgenetic alopecia (genetic, ~70%)
By far the most common cause in both men and women. The mechanism: testosterone converts to DHT (dihydrotestosterone) by the enzyme 5-alpha-reductase. DHT binds to androgen receptors on scalp follicles in the frontal, temporal and crown zones — but not the back-of-scalp zone. Affected follicles miniaturise, producing thinner hair each cycle until they vanish.
How to identify: matches Norwood pattern in men (M-shape recession, crown thinning) or Ludwig pattern in women (central part-line widening); family history present; progression over 12-24 months.
Treatment: Minoxidil 5% topical (works in 60-70% of compliant users), Finasteride 1mg oral (works in 80-85% of men, contraindicated in women of child-bearing age), PRP/GFC every 4 weeks for 4 sessions, and hair transplant surgery once stable. Read our money page for the full surgical protocol.
Cause 2 — Telogen effluvium (stress-related)
The body has roughly 100,000 scalp follicles; at any time, 90% are in growth (anagen) and 10% in rest (telogen). A major stressor — surgery, severe illness, bereavement, COVID, childbirth, crash dieting — can push 30-50% of follicles into telogen simultaneously. The hair sheds 6-12 weeks after the stressor.
How to identify: sudden, dramatic, diffuse shedding 2-4 months after a known stressor; clumps in the shower; even thinning across whole scalp; no specific pattern.
Treatment: Reassurance and time — telogen effluvium reverses spontaneously in 3-6 months once the stressor ends. PRP can speed regrowth by 30-40%. We never recommend transplant for telogen effluvium.
Cause 3 — Nutritional deficiency
Underrated and very common in Indian patients. The big four:
- Iron / ferritin — extremely common in Indian women (menstruating, vegetarian). Target ferritin >70 ng/mL for hair growth (lab “normal” of >12 is too low for hair).
- Vitamin D — over 80% of urban Indians are deficient. Target 30-50 ng/mL.
- Vitamin B12 — common in vegetarians. Target >400 pg/mL.
- Protein — under-consumed in vegetarian diets. Target 1.2-1.6 g/kg body weight.
How to identify: blood panel at first consult. We test ferritin, vitamin D, B12, TSH, and CBC.
Treatment: Replenish under medical supervision (some supplements interact). Hair recovery follows blood normalisation by 3-4 months.
Cause 4 — Thyroid disease
Both hypothyroidism and hyperthyroidism cause diffuse hair thinning. Hashimoto’s thyroiditis (autoimmune hypothyroid) is particularly common in Indian women and often goes undiagnosed for years.
How to identify: diffuse thinning + classic thyroid symptoms (cold intolerance, weight changes, fatigue, palpitations); confirmed by TSH + Free T4 + anti-TPO antibodies.
Treatment: Endocrinology referral. Hair recovery typically follows TSH normalisation by 3-6 months.
Cause 5 — Scalp conditions
Localised, treatable scalp issues that mimic generalised hair loss:
- Seborrheic dermatitis — flaky, itchy scalp; treated with ketoconazole shampoo, mild topical steroid.
- Fungal infection (tinea capitis) — patchy loss with broken hairs; treated with oral antifungals.
- Folliculitis — pus-filled bumps; treated with antibiotics.
- Lichen planopilaris / scarring alopecia — permanent loss; needs early diagnosis to prevent further damage.
Female-specific causes
- Postpartum telogen effluvium — reverses by 9-12 months postpartum.
- PCOS — elevated androgens cause female-pattern thinning; treated by gynaecologist + Minoxidil + PRP.
- Traction alopecia — from tight buns, braids, extensions, weaves; reversible if caught early; permanent if chronic.
- Trichotillomania — compulsive pulling; needs psychological + dermatological care.
- Menopausal hair loss — declining oestrogen unmasks androgen effect; treated with topical therapy.
The Curls n Crowns first-consult workup
- History (10 minutes) — Family history, timeline, stressors, medications, dietary review.
- Physical exam (5 minutes) — Scalp inspection, hairline measurement, donor density assessment.
- Trichoscopy (5 minutes) — Polarised microscopy to assess miniaturisation and follicular density quantitatively.
- Blood panel (off-site lab) — Ferritin, vitamin D, B12, TSH, free T4, CBC; for women add LH/FSH/testosterone if PCOS suspected.
- Diagnosis + plan (15 minutes) — Cause identified, treatment matrix explained, written 6-month plan provided.
Total time: ~45 minutes. Cost: free. Outcome: a clear answer, in writing.
When is surgery the right answer?
Hair transplant surgery is the right next step when ALL of the following are true:
- Cause is androgenetic alopecia (not telogen effluvium, thyroid, nutritional)
- Pattern is stable for 12+ months
- Norwood Stage 3 to Stage 6 (or Ludwig 2-3)
- You have tried medical therapy (Minoxidil, Finasteride if appropriate) for at least 12 months
- Donor density is sufficient (assessed at consult)
- Expectations are realistic
If all six are checked, our main hair transplant page walks through the surgical options.
Frequently asked questions
- What are the main causes of hair loss in men?
- The five most common causes in Indian men are: (1) Androgenetic alopecia (genetic, ~70% of cases), (2) Telogen effluvium (acute stress, illness, surgery), (3) Iron and Vitamin D deficiency, (4) Thyroid disorders (hypo and hyper), and (5) Scalp conditions like seborrheic dermatitis or fungal infection. Identifying the cause is step one before any treatment.
- What are the main causes of hair loss in women?
- Female-specific causes include: (1) Female pattern hair loss (Ludwig pattern), (2) Postpartum telogen effluvium, (3) PCOS-related hair thinning, (4) Iron deficiency anaemia, (5) Thyroid disease, (6) Traction alopecia from tight buns/braids/extensions, and (7) Crash dieting / extreme weight loss. Female hair loss is rarely a single cause — usually 2-3 overlap.
- How do I know if my hair loss is genetic or temporary?
- Three signs it is genetic (androgenetic): (1) Pattern matches Norwood or Ludwig, (2) Family history of balding, (3) Slow progression over 12+ months. Three signs it is temporary: (1) Sudden diffuse loss after a stressor (illness, surgery, childbirth, weight loss), (2) Hair thins evenly across whole scalp, (3) New growth visible 3-6 months after the stressor ends.
- Can stress cause hair loss?
- Yes — but in a specific way. Acute stress (illness, bereavement, surgery, severe COVID) can trigger telogen effluvium 6-12 weeks later, where 30-50% of follicles enter the resting phase simultaneously. The hair sheds 2-3 months after the stressor. Good news: it almost always reverses within 3-6 months once the stressor is gone.
- Does diet affect hair loss?
- Significantly. Iron deficiency (very common in Indian women), vitamin D deficiency, vitamin B12 deficiency, and protein malnutrition all cause diffuse hair thinning. We test these at every Curls n Crowns consult — fixing nutritional deficiencies often reduces hair loss by 30-50% before any other treatment.
- Can hair loss be a sign of disease?
- Sometimes, yes. Hair loss with cold intolerance and weight gain → check thyroid. Hair loss with fatigue and pale skin → check ferritin and haemoglobin. Hair loss with acne and irregular periods → check PCOS panel. Hair loss with recent severe illness → expect telogen effluvium. We screen for all of the above as part of consult.
- Does using too much product (gel, wax, shampoo) cause hair loss?
- Generally no. Topical products do not penetrate the follicle deep enough to cause genetic balding. They can, however, cause scalp irritation that worsens existing hair loss or trigger temporary shedding. Sulfate-free shampoos and avoiding daily heat-styling help.
- How does PCOS cause hair loss in women?
- PCOS elevates androgens (male hormones), which converts to DHT, which miniaturises scalp follicles in genetically susceptible women — creating a ‘female-pattern’ diffuse thinning. Treatment combines metformin / spironolactone / oral contraceptive (gynaecologist-led) with topical Minoxidil and nutritional support. PRP helps.
- Is COVID-19 hair loss permanent?
- No. Post-COVID hair shedding is classic telogen effluvium triggered by the febrile illness and inflammation. It starts 8-12 weeks after the infection, peaks at 4 months, and resolves by month 9-12. We do NOT recommend transplant for post-COVID shedding — give it a year to recover.
- Can young people in their 20s lose hair?
- Yes — and increasingly. Genetic balding can start as early as age 16 in highly susceptible men. Add high-cortisol lifestyle, poor sleep, processed food, and modern stress, and we now see Norwood Stage 3 in 23-25 year-olds. Early diagnosis + Finasteride + lifestyle change can stop it before it becomes Stage 5.
- How long should I try medical treatment before considering surgery?
- 12 months minimum. The hair-growth cycle is slow — Minoxidil takes 4 months to show effect, Finasteride takes 6 months, PRP needs 4-6 sessions over 6 months. If after 12 months of compliant medical therapy your loss is still progressing, surgical hair restoration becomes the right next step.