Thyroid Hair Fall · Diffuse Shedding India
Thyroid-Induced Hair Fall —
Why an Underactive or Overactive Gland Thins Hair
Thyroid hair fall treatment depends on first correcting the gland, not just the scalp. Thyroid hormones set the pace of the hair growth cycle, so when levels swing too low (hypothyroid) or too high (hyperthyroid), a large share of follicles can shift into the resting and shedding phase at once. The result is diffuse, all-over thinning — often with dry, brittle strands and a wider part — rather than a bald patch. Because the trigger is metabolic, the reassuring news is that hair usually recovers once thyroid levels are stabilised and any iron or vitamin gap is corrected. Getting the correct diagnosis is what makes recovery possible.
Reviewed by Dr. Amit Agarkar, MD DNB Dermatology, Mumbai
1What Causes Thyroid Hair Fall?
- Hypothyroidism: Low thyroid hormone slows the follicle cycle, pushing many hairs into shedding and leaving strands dry and brittle.
- Hyperthyroidism: Over-active thyroid speeds metabolism and can also tip follicles into early shedding.
- Hashimoto's / autoimmune thyroiditis: Autoimmune thyroid disease (anti-TPO positive) can coincide with other autoimmune hair conditions.
- Treatment-related shifts: Starting or adjusting thyroid medication can briefly worsen shedding before levels stabilise.
- Linked deficiencies: Thyroid disorders often travel with low ferritin, vitamin D or B12, which add to the shedding.
2Symptoms to Watch For
White or yellow flakes on shoulders
Persistent scalp itching
Greasy scalp within 24hrs
Redness on scalp
Tightness or burning
Worse in winter or stress
3Dandruff Treatment Options
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Pharma Treatments
- Ketoconazole 2% shampoo — 3× per week
- Zinc Pyrithione shampoo
- Selenium sulphide for severe cases
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Home Care
- Tea tree oil (5% dilution) massage
- Apple cider vinegar rinse
- Reduce dairy & refined sugar
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AI-Based Plan
- AI distinguishes dandruff vs psoriasis
- Scalp photo severity analysis
- Monthly protocol adjustment
🏥 When to See a Dermatologist
See a dermatologist if dandruff doesn't improve after 4 weeks, if accompanied by hair loss, or if you notice thick silvery plaques.
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4Frequently Asked Questions
Ketoconazole 2% and Zinc Pyrithione are the clinically strongest options. Rotate to prevent resistance.
Yes — chronic inflammation accelerates shedding. Treating dandruff reduces hair fall within 4–6 weeks.