Autumn Hair Shedding. Why It Happens And When It Is Not Seasonal

Autumn is the season people notice their hair, and for the majority the shedding resolves by itself in a matter of weeks. This is not folklore. When shedding has been measured across the year, the share of hairs sitting in the resting phase reaches its high point in summer, and since a resting hair needs roughly 100 days before it releases, the fallout lands in autumn. Understanding that spares a lot of anxiety. Understanding when the pattern does not fit spares hair.

Key points

  • Seasonal shedding is a real, measured phenomenon, with resting-phase hairs peaking in summer and the shedding following about 100 days later.

  • A normal day means roughly 50 to 100 hairs, and far more than that on a wash day following several days without washing.

  • The seasonal version is diffuse, self-limiting and generally over within 6 to 8 weeks. It does not hollow out one region of the scalp and it does not make regrowth finer.

  • Shedding that runs past 3 months, a scalp that is becoming more visible, or hairs returning thinner than before all point away from a seasonal cause.

Shedding more than usual this autumn? Message a GMC-registered doctor on WhatsApp or email team@thewellnesslondon.com.

Why autumn

The hair cycle has a season

Every follicle works through a cycle. The large majority are growing, a minority are resting for around 100 days, and at the close of that rest the hair is released and a replacement starts underneath. What is easy to miss is that these phases are not spread evenly across the calendar.

Work following shedding over multiple years has shown the resting-phase proportion climbing to its annual peak during summer. Allow the roughly 100 days that a resting hair takes to let go, and the result surfaces in early to mid autumn. That is the reason September, October and November look worst in the shower and on the pillowcase, and the reason the same people go through it year after year.

Why it feels dramatic

A few things exaggerate the effect. Hair that has been loosening across several days all arrives at once when you finally wash. Length distorts volume, so what collects in the drain says more about how long your hair is than how much of it came out. And attention compounds the problem, which is why somebody who never gave their shedding a thought in March is counting individual hairs by October.

How to tell seasonal shedding from something else

What seasonal shedding looks like

It is diffuse, spread over the whole scalp instead of concentrated anywhere. It is time-limited, easing within roughly 6 to 8 weeks. The hairs you are losing are full length and their usual calibre. Your parting is the width it was in spring, and your scalp shows no more than it did under the same bright light.

What it does not look like

Loss focused on one zone, such as the temples, the crown, or a parting that keeps widening.

Regrowth that is shorter and finer than the hair it replaced. That is miniaturisation rather than shedding, and it is a separate and progressive problem.

Shedding still going at 3 months. The seasonal kind stops on its own. Telogen effluvium triggered by illness, surgery, childbirth or a weight-loss medication usually begins 2 to 3 months after the trigger and runs for 3 to 6 months. Anything continuing beyond that warrants investigation.

Symptoms in the scalp itself. Redness, scale, itch, soreness, burning, or a smooth glossy strip where the hairline used to sit. These raise the possibility of a scarring alopecia, in which follicles are lost permanently, and they are the presentations to act on promptly rather than sit out.

Not sure which yours is? Ask our doctors on WhatsApp.

Two things you can do at home

The pull test

Leave at least a day between washing and testing. Gather about 50 to 60 hairs between your thumb and fingers at the scalp, then draw your hand smoothly down the length to the tips. Count whatever is left in your hand. Under about 6 is ordinary. Repeatedly above that, sampled from several parts of the scalp, indicates active shedding rather than normal turnover.

Monthly photographs

Photograph your parting, hairline and crown in the same lighting on the same date each month. For anyone anxious about their hair this is the most valuable habit available, because shedding is visually alarming while density changes slowly, and memory handles neither well. If your parting next January is indistinguishable from the one in October, the autumn shed was seasonal regardless of how it felt.

What is worth doing, and what is not

Worth doing

Waiting, where the picture matches seasonal shedding. For most people reading this it is the clinically correct course and it costs nothing.

Testing your bloods where the shedding is heavy, drawn out or repeating, because low ferritin, thyroid disease, and low vitamin D, B12 or zinc all hold hair growth back and are common findings, especially in women. A laboratory reference range is not a threshold for growing hair, and a ferritin result perched just above the bottom of the range is routinely reported as normal while being too low to support proper regrowth.

Looking after what you have through gentler handling, less tension and heat, and enough protein.

Not worth doing

Buying an anti-shedding shampoo. None of them reverses miniaturisation, and a seasonal shed ends whether or not you bought one, which is precisely why their November reviews are so glowing.

Beginning a treatment course out of panic. If the cause was seasonal, you will credit the natural recovery to whatever you started, and pay for it indefinitely afterwards.

Writing it off as seasonal for a second and a third year without ever looking. Heavy shedding that keeps returning deserves one round of blood tests.

When to see a doctor

Arrange an assessment if the shedding has run beyond 3 months, if there is visibly more scalp than a year ago, if new hairs are coming through finer, if there are discrete patches or a retreating hairline, or if the scalp itself has any symptoms whatsoever.

The argument for acting instead of waiting in those cases is biological. Treatment acts on follicles that are miniaturising but alive, and achieves nothing on follicles that have already shut down. NICE and the British Association of Dermatologists both emphasise establishing the underlying cause of hair loss before treating it, and a great deal of what drives shedding can be measured and put right.

Book a review if it has gone past 3 months. Message us on WhatsApp.

What assessment and treatment involve

Nothing starts with a booking. Every enquiry begins with a free doctor-led suitability review. A GMC-registered doctor inspects your scalp, uses dermoscopy to establish whether follicles are healthy, miniaturising or scarred, and organises bloods covering full iron studies, full thyroid function with antibodies, vitamin D, B12, folate, zinc, full blood count, HbA1c and the relevant hormonal markers, all run from the same clinic.

That produces one of two answers. Approved, with a defined plan. Or not approved, which at this time of year is frequently what we say, because what you have is a seasonal shed that is going to settle, occasionally with a deficiency to correct alongside it. A meaningful proportion of enquiries are turned away on exactly that basis, and we prefer that to selling a course to somebody whose hair was due to recover regardless.

Where treatment is warranted, PRP has solid evidence in pattern hair loss, with a 2025 meta-analysis in Dermatology and Therapy pooling 43 randomised controlled trials and 1,877 participants and finding an increase in hair density. On price, flagship Harley Street and Mayfair clinics routinely charge £600 to £850 or more per session. Our care is doctor-led and sits below those rates, confirmed to you after your review.

Why people choose The London PRP Clinic by The Wellness

The London PRP Clinic by The Wellness is a doctor-led, blood-test-first clinic working from 10 Portman Square in Marylebone and the Light Centre in Belgravia. Treatments are carried out by GMC-registered doctors, and no clinician treats a patient here before completing 100 supervised treatments.

Diagnosis, testing and treatment stay with a single medical team, and we are prepared to tell you that treatment is unnecessary, which throughout October is the most common honest answer there is.

Book your free suitability review. Message us on WhatsApp, email team@thewellnesslondon.com, or call +44 20 3951 3429.

Frequently asked questions about autumn hair shedding

Is it normal to shed more hair in autumn?

Yes. Measurements of seasonal shedding show resting-phase hairs peaking during summer, and because a resting hair needs about 100 days to release, the shedding surfaces in autumn.

How long does seasonal hair shedding last?

Around 6 to 8 weeks as a rule, resolving without intervention. Anything still going beyond 3 months is not seasonal and deserves investigation.

How many hairs a day is normal?

Somewhere between 50 and 100, and a good deal more on a wash day after several days without. What happens across months tells you far more than any single day's count.

How do I know if it is more than seasonal?

It is not seasonal if the loss sits in one area, if the hairs growing back are finer and shorter, if more scalp shows than a year ago, or if there is redness, scale, itch or tenderness.

Should I start a treatment now?

Usually not, where the picture fits seasonal shedding. Starting a course in a panic means crediting the treatment with a natural recovery and then paying for it indefinitely.

Do shedding shampoos work?

They do not reverse miniaturisation. Seasonal shedding clears up with or without them, which explains their remarkable reliability every autumn.

This article is for information and does not replace personal medical advice. Individual results vary. All treatments at The London PRP Clinic by The Wellness are performed by GMC-registered doctors. Reviewed by [GMC-REGISTERED DOCTOR NAME, GMC NUMBER TO CONFIRM], The London PRP Clinic by The Wellness. Last updated September 2026.

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