The short explanation
Losing some hair every day is normal; most people shed dozens of hairs daily without noticing. Heavy shedding over a few months often follows a trigger two to three months earlier: childbirth, a high fever or illness such as dengue or COVID, surgery, crash dieting, stopping hormonal contraception, or major stress. This kind of shedding usually recovers on its own over months. Hair fall that continues, or thinning at the parting or crown, is worth checking for low iron, thyroid problems, PCOS and other causes.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Low iron, vitamin B12 deficiency and thyroid conditions are common, testable causes. Female-pattern hair loss, which tends to run in families, causes gradual widening of the parting rather than clumps. Patchy bald spots, tight hairstyles, and scalp conditions have their own causes and treatments.
- Many oils, shampoos and supplements are sold for hair fall with little evidence. Treating the underlying cause, where there is one, matters more.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you why your hair is falling or whether it will grow back. That needs an examination of the scalp and sometimes blood tests.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Could anything in the last few months have triggered this?
- Should my iron, thyroid, or vitamin levels be checked?
- Is this shedding, or thinning that needs treatment?
- What treatments have good evidence, and how long do they take?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
- See a clinician within days for hair loss with tiredness, weight change or feeling cold (possible thyroid or anaemia), patchy bald spots, or a sore, red or scaly scalp.
- Book a routine appointment for shedding that has continued beyond six months or gradual thinning at the parting.
Sources
The evidence this explanation is built on.
- Hair loss NHS
- Hair loss MedlinePlus (US National Library of Medicine)
- Underactive thyroid (hypothyroidism) NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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