Hair loss 2 months after COVID or a high fever: why it shows up then

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After COVID-19, hair shedding usually begins 2 to 3 months later and lasts 3 to 6 months (AAD); a JAAD case series found onset at a median of 45 days, somewhat earlier than after other triggers.

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The timeline

Stage	When (typically)	What's happening
Onset	Usually 2–3 months after; median 45 days in one series	AAD: shedding usually begins 2 to 3 months after COVID-19; one study found it often began after 56 days. [American]
Earlier than usual?	Median 45 days (n=30)	JAAD letter: onset at a median of 45 days after a positive test; median duration 47.5 days. [Journal]
Duration	Usually 3–6 months	AAD: shedding usually lasts 3 to 6 months, then hair starts regrowing on its own. [American]
Full regrowth	Most within 6–8 months	AAD: most people see complete regrowth within 6 to 8 months. [American]

Shedding or alopecia areata? Different clocks

	Shedding (telogen effluvium)	Alopecia areata flare
Pattern	Diffuse, all over	Round patches
Typical start	2–3 months after [American]	1–3 months after in studies [American]
Usual course	Regrows on its own [American]	Harder to predict; may need treatment [American]

What the evidence pooled

A scoping review of 58 published cases found a median onset of 2.0 months and, where outcomes were reported, 95% resolution with a median recovery time of 5.0 months [PubMed]. Fever from other illnesses is also on the AAD's trigger list [American].

Normal vs. warning signs

Commonly normal

Diffuse shedding beginning 6–12 weeks after the illness
Club hairs with a white bulb
Shedding easing within a few months

Warning signs — get checked

Patches or smooth bald spots
Scalp pain, redness, burning or scaling
Loss of eyebrows, eyelashes or body hair
Round, smooth patches (possible alopecia areata)
Shedding continuing beyond about 6 months

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What may help

Give it time: AAD says most people regrow without treatment.
Ask about iron and thyroid tests if shedding is heavy or prolonged.
See a dermatologist promptly for patches.

Related triggers

Procedures

Telogen club hair

Frequently asked questions

Is hair loss 2 months after COVID normal?

Yes. AAD says shedding usually starts 2 to 3 months after COVID-19, and one series found a median of 45 days.

How long does post-COVID hair loss last?

AAD says usually 3 to 6 months, with most people fully regrown within 6 to 8 months.

Can a high fever cause hair loss months later?

Yes. High fever is on the AAD's list of common shedding triggers, and shedding appears a few months later.

Is post-COVID hair loss permanent?

In a review of 58 cases, 95% of those with reported outcomes resolved.

Sources

American Academy of Dermatology. Can COVID-19 cause hair loss?
Journal of the American Academy of Dermatology. Time of onset and duration of post-COVID-19 acute telogen effluvium (n=30)
PubMed Central (PMC9349634). Characteristics of hair loss after COVID-19: a systematic scoping review (PMC9349634)
American Academy of Dermatology. Do you have hair loss or hair shedding?