Covid hair loss — the London trichologist's guide, four years on
Post-Covid shedding is real telogen effluvium — and four years of data now tell us exactly what to expect and what to do.
Dr. Amara Okafor
Consultant Trichologist · Harley Street
In short
- Onset: 8–12 weeks after infection.
- Duration: 3–6 months of shed, 6–12 months regrowth.
- About 25–30% of post-Covid patients experience it.
- Repeated infections can retrigger. Full recovery is the norm.
Post-Covid hair loss is telogen effluvium triggered by the febrile, inflammatory phase of infection. Four years of London trichology data now show a consistent pattern — and consistently good outcomes.
Why Covid triggers it
Fever above 39°C, systemic inflammation, and — for some — the metabolic stress of long Covid all push follicles into telogen synchronously. This isn't unique to Covid; any viral illness with fever can do it. Covid was just widespread enough to make it visible.
Treatment protocol
- Ferritin, TSH, vitamin D, B12 — correct any deficiency
- Minoxidil 5% topical — optional, accelerates regrowth
- Nutritional adequacy (protein 1.2g/kg/day for the recovery period)
- Reduce concurrent stressors where possible
When to worry
If shedding continues beyond 6 months, if hair regrows visibly thinner, or if patchy loss appears — see a trichologist. These can indicate chronic TE, unmasked female-pattern loss, or (rarely) an autoimmune trigger.
Frequently asked
Common questions
Does the vaccine cause hair loss?+
Reported rarely, mechanism unclear. Post-infection loss is much more common.
Can long Covid keep hair loss going?+
Yes — persistent inflammation can drive chronic TE. Investigate underlying long-Covid management.
Will it come back with reinfection?+
It can, though usually milder. The follicles are the same; the trigger is smaller the second time.
Keep reading
Related, trichologist-reviewed
Hair loss
Telogen effluvium in London: why you're shedding, what actually works, and how long recovery really takes
Telogen effluvium is the most over-diagnosed and under-explained shedding condition in London. Here is what is actually happening, and the recovery timeline no-one will give you straight.
Read
Hair loss
Stress hair loss in London: telogen effluvium decoded
Stress-induced shedding is the most common reason 25–40 year-old Londoners walk into a trichology clinic. Here is what is happening and what to do.
Read
Hair loss
Iron deficiency and hair loss: the London ferritin target
Ferritin is the marker most likely to change your hair — and the one most likely to be ignored at a standard blood draw.
Read