Why do we lose our hair in autumn?

What you must remember

Autumn hair loss is a physiological and well-documented phenomenon: the proportion of hairs in the resting phase peaks in July, and shedding occurs one to two months later. It lasts six to ten weeks and resolves on its own. The goal is not to prevent it, but to prepare for the subsequent regrowth.

 

  • The autumn fall is physiological and affects everyone.
  • It is triggered in the summer: the peak of resting occurs in July.
  • It lasts six to ten weeks and resolves without intervention.
  • Beyond three months or with further refinement, it is no longer seasonal.
Why do we lose our hair in the fall? - MakeMyMask

Every year, between September and November, hairbrushes fill up and showers become a source of anxiety. Autumn hair loss is real, documented, and affects everyone. But its trigger isn't in autumn: it occurs in the middle of summer, several weeks before the first hair falls out.

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A well-documented seasonal decline

Hair follows a three-stage cycle: growth, transition, and rest. Normally, ten to fifteen percent of hairs are in the resting phase, which corresponds to a shedding of fifty to one hundred hairs per day. In autumn, this proportion increases significantly for a few weeks.

  • A Swiss study of over eight hundred women measured this annual rhythm using trichograms.
  • The proportion of hairs in the resting phase peaks in July and is at its lowest at the end of winter.
  • A second, more discreet peak occurs in the spring.


Autumn hair loss is the only effluvium I consider normal. It's physiological, it affects everyone, and it resolves itself. My job isn't to prevent it; it's to ensure that the subsequent regrowth is dense, and to identify cases where this isn't the case at all.
Dr. Julie PernetDoctor of Pharmacy & Certified Trichologist

Why does it trigger in summer, not in autumn?

This is the most counterintuitive point. It is the long summer days that cause a higher proportion of follicles to switch into the phase of rest, through a mechanism linked to duration from sun exposure. This hair remains several in place weeks before being evicted — hence the gap. When the fall becomes Visibly, the cause is behind you. for two months.

Seasonal hair loss or established hair loss: recognize yours

It's about probably due to a seasonal drop if You check several of these boxes:

  • A decline that begins between September and November, and not at any other time
  • A diffuse hair loss all over the head, without bare area
  • A limited time: six at ten weeks, rarely more
  • The same episode observed the previous years at the same period
  • No progressive refinement hair over the years

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Before
After
After

Verified review

"I bought this product without much hope because of my hair loss related to PCOS. Two months later, the result is amazing: I barely lose ten hairs when brushing, and my baby hairs are growing back everywhere. My roots are already thicker."

Solène R., a customer for 9 months

Discover the solution

Le protocol for getting through autumn

A seasonal fall does not need to be stopped: she It stops on its own. The challenge is regrowth. which follows. We stimulate the leather microcirculation hair through massage and care Topical factors are introduced, along with cofactors. necessary for keratin synthesis, and we avoids adding an aggression to a scalp already stressed by the summer. Start at the end of August, before the peak, significantly changes the experience of these weeks.

Tricho-Boost Anti-Hair Loss Protocol

Alternative to Minoxidil

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To remember

  • The autumn fall is physiological and affects everyone.
  • It is triggered in the summer: the peak of resting occurs in July.
  • It lasts six to ten weeks and resolves without intervention.
  • Beyond three months or with further refinement, it is no longer seasonal.

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F.A.Q

How many hairs do we lose per day in autumn?
Normally, it's fifty to one hundred. During the seasonal peak, this number can double for a few weeks. It's visually striking but has no impact on density, since the affected follicles resume growth.
How long does the autumn fall last?
Generally, the decline lasts six to ten weeks, with a peak between September and October. If the decline lasts longer than three months or occurs outside the season, it is probably no longer a seasonal phenomenon.
Should you take dietary supplements in the autumn?
They do not stop seasonal hair loss, which stops on its own. They support regrowth by providing the cofactors for keratin synthesis, which makes sense during a period when many follicles are restarting at the same time.
How can I tell if my hair loss is not just seasonal?
Three signs should raise concern: hair loss lasting more than three months, a widening part or receding temples, and hair that is noticeably thinner than it was two years ago. These elements point towards androgenic alopecia, which autumn only serves to highlight.
Can we avoid the autumn fall?
No, and it's not desirable: it's a normal renewal process. However, we can prepare the ground from the end of August — by cleansing the scalp, stimulating microcirculation, and providing nutrients — so that regrowth is rapid and dense.

Written by

Dr. Julie Pernet

Doctor of Pharmacy & Certified Trichologist.Doctor of Pharmacy and trichologist, founder of the DermoPilaire MakeMyMask Laboratory. She develops treatment protocols focused on scalp health, based on microbiome science and pH5 balance.

Dr. Julie Pernet