If you notice noticeably more hair than usual on your brush or in the shower drain, it doesn't automatically mean permanent hair thinning. Often it's telogen effluvium — a temporary, diffuse shedding of hair that usually subsides once the trigger has been removed.
What is telogen effluvium?
Hair grows in cycles: most follicles are in an active growth phase, a smaller share are in a resting phase, and then the hair sheds to make way for a new one. In telogen effluvium, a larger-than-usual number of follicles switch into the resting phase at once. A few months later, these hairs shed diffusely across the whole scalp.
There's a reassuring fact here: the follicles themselves aren't damaged. They're temporarily "on pause", and growth usually resumes once the body's balance has been restored.
Common triggers
Telogen effluvium usually develops about two to three months after some physical or emotional strain. It's precisely because of this delay that people often find it hard to recognise the root cause. Among the more common triggers are:
- Severe stress — psychological strain, grief or burnout
- Illness and fever — for example a severe viral infection or surgery
- Childbirth — hormonal changes after the end of pregnancy (so-called postpartum shedding)
- Rapid weight loss or a strict diet — especially when the body is deprived of protein, iron or other nutrients
- Certain medications — some medicines can temporarily affect the hair cycle
- Thyroid disorders and hormonal changes
How to tell it apart from hereditary hair loss?
Telogen effluvium is often confused with androgenetic, or hereditary-type, hair loss, but the two are different in nature.
- Pattern. Telogen effluvium is diffuse — the hair thins evenly across the whole scalp. Androgenetic hair loss is localised, usually affecting the temples, the hairline or the crown.
- Duration. Telogen effluvium is temporary and mostly resolves on its own. Hereditary hair loss is progressive and worsens over time without intervention.
- The follicle. In telogen effluvium the follicles stay healthy. In androgenetic hair loss the follicles gradually shrink and eventually stop producing hair.
This is why an accurate diagnosis matters: the approach to these two conditions is completely different.
How long does it last?
In most cases telogen effluvium is temporary. Once the trigger has been removed, active shedding usually lasts a few months, after which new hair gradually begins to grow. Restoring full density can take time, because hair grows slowly.
What you can do yourself to support your body:
- Eat a balanced diet, paying attention to getting enough protein and iron
- Manage stress and look after your sleep
- Avoid harsh diets and sudden weight fluctuations
- Handle your hair gently and don't subject it to excessive heat or strong tension
When to see a specialist?
Although telogen effluvium often resolves on its own, it's worth consulting a specialist if:
- the shedding lasts longer than six months
- the thinning is clearly localised rather than diffuse
- you notice redness, itching or pain on the scalp
- the hair changes are accompanied by other symptoms, such as fatigue or weight changes
A specialist can rule out other causes and assess whether this is a temporary condition or something more lasting. Results vary from person to person, and a personal consultation helps find the solution that's right for you. You can also find more hair-health topics on our website.
Summary
Telogen effluvium is a common and usually temporary form of hair loss triggered by stress, illness, childbirth, rapid weight loss or certain medications. Unlike hereditary hair loss, it's diffuse and usually reversible once the underlying cause has been addressed.
If your hair loss is worrying you or lasts longer than expected, you're welcome to visit our clinic for a free consultation, where we'll assess your situation and discuss suitable options.