There are two types of hair loss that men are most concerned about: hereditary baldness and the sudden, diffuse hair loss that sometimes seems to come out of nowhere. The second type often has a name you probably don't know: telogen effluvium.
If you've been losing more hair than usual in recent months while showering, on your pillow, or in your brush, but you don't have a clear pattern of a receding hairline or a thinning crown, then there's a good chance that stress is the cause. And that's fundamentally different from genetic hair loss.
In this article, I explain what telogen effluvium is, how to recognize it, how long it lasts, and what you can do about it.
What is telogen effluvium?
Your hair grows in cycles. Most hairs are in the growth phase (anagen), a smaller group in the transitional phase (catagen), and about 10-15% rest in the resting phase before falling out and being replaced by new hairs.
With telogen effluvium, this system goes awry. After a stressful period, a large proportion of your hairs simultaneously shift into the resting phase. Six to twelve weeks later, they fall out. Not gradually, but in large numbers all at once.
It feels alarming, and that's understandable. But the mechanism is different from androgenetic alopecia (hereditary baldness), and that has major implications for what you can do about it.
What are the most common triggers?
Telogen effluvium almost always occurs after a trigger. The best known are:
- Mental or emotional stress — a difficult period at work, a breakup, grief, financial problems. The body reacts to prolonged psychological pressure by adapting the hair cycle.
- Physical stress — severe illness, surgery, high fever, or a serious infection. During such a period, your body prioritizes recovery, not hair growth.
- Nutritional deficiencies — a sudden low iron level, zinc deficiency, or a severely calorie-restricted diet. Crash diets are a known trigger.
- Hormonal fluctuations — fluctuations in thyroid hormones or a low testosterone level can also play a role in men.
The specific thing about telogen effluvium is that delay: you only experience hair loss weeks or months after the actual cause. This sometimes makes it difficult to make the connection.
How do you distinguish it from hereditary baldness?
This is the question most men really want to answer: is this temporary, or am I going to go bald?
- Pattern — hereditary baldness follows a pattern. The hairline recedes at the temples, the crown thins, or both. With telogen effluvium, you lose hair all over your head, diffusely spread. No clear pattern.
- Sudden versus gradual — genetic hair loss is an insidious process over years. Telogen effluvium feels like a sudden increase in a short time.
- Identifiable cause — has it been happening for years, or is it new and started after something you remember? Telogen effluvium almost always has an identifiable cause, even if it only becomes clear afterwards.
If you're in doubt, visiting your GP is the surest way. A blood test can rule out nutritional deficiencies, and a dermatologist can assess which phase your hairs are in.
How long does it last?
In acute telogen effluvium, caused by a single event, the shedding period lasts an average of three to six months. After that, hair growth recovers spontaneously, provided the trigger has disappeared.
Full recovery, where hair density returns to its previous level, takes six to twelve months after the shedding stops in most cases.
There is also a chronic form, where hair loss persists for longer than six months. This requires more attention and is less predictable.
What can you do?
Telogen effluvium usually disappears on its own. But "on its own" doesn't mean you can't do anything.
- Address the trigger. If stress is the cause, addressing sleep, relaxation, and recovery helps more than any product.
- Check your diet. Ensure adequate iron, zinc, and protein. Not as a supplement just to do something, but because deficiencies can prolong the shedding. If you're in doubt, ask for a blood test.
- Support your hair follicles. During the recovery period, products that stimulate blood flow to the scalp can support the recovery process. Hairborn's Growth Serum contains ingredients like Redensyl and Procapil that support the hair follicle and can promote the transition to the growth phase, without the side effects that medication sometimes has.
- Be patient. Hair growth is slow. Even if you do the right things, you won't see results for months.
What doesn't work
Biotin is listed as an ingredient on many hair products, but supplementation only works if you have a demonstrable biotin deficiency, which is rare. At normal levels, extra biotin has no proven effect on hair growth.
Anti-stress shampoos and complex supplements that promise to regrow hair are largely marketing. The hair grows back when the body recovers, not thanks to a shampoo.
Hereditary baldness as an underlying risk
One nuance to mention: sometimes someone already has a genetic predisposition to baldness, and a period of telogen effluvium acts as an accelerator. Hairs that normally could have lasted for years fall out earlier.
Even if you fully recover from telogen effluvium, an underlying pattern of hereditary baldness that was always there can become visible. This is relevant to know, because the approach is then different.
In short
Hair loss due to stress, telogen effluvium, is recognizable by diffuse shedding all over the head, almost always with an identifiable trigger three to six weeks earlier. In most cases, it recovers spontaneously when the underlying cause disappears. It differs fundamentally from hereditary baldness, although both can be present simultaneously.
If you are unsure about the cause, don't settle for an assumption. A visit to the GP or dermatologist takes an hour and provides much more certainty than hours of searching online.
Frequently asked questions
Can telogen effluvium return if you experience stress again?
Yes, telogen effluvium can return if you experience a similar trigger again, such as a new stressful period, illness, or nutritional deficiency. It is not a condition that you go through once and are then permanently free from; it is related to what your body is going through at that moment.
Is there a test to definitively diagnose telogen effluvium?
There is no single test that proves telogen effluvium with 100% certainty, but a doctor can get a good idea through a pull test, where a small bundle of hair is gently pulled, and possibly a blood test. The combination of diffuse pattern, identifiable trigger, and timing is usually sufficient for a reliable diagnosis.
Can you get telogen effluvium from lack of sleep alone?
Yes, persistent lack of sleep alone can cause enough physical stress for the body to trigger telogen effluvium, even without obvious emotional stress. Sleep plays an important role in recovery processes throughout the body, including the hair growth cycle.
Does exercise help against telogen effluvium, or can it worsen it?
Moderate, regular exercise can actually reduce stress and thus indirectly contribute to recovery. However, excessively intensive training without sufficient recovery can itself act as a physical stressor and worsen or prolong telogen effluvium. Balance is more important here than the amount of exercise itself.
Can you use Hairborn during telogen effluvium?
Yes, you can continue to use Hairborn during this period. The serum supports the hair follicle and can contribute to a smoother transition back to the growth phase, but it does not replace addressing the underlying trigger, such as stress or a deficiency.
Is telogen effluvium contagious?
No, telogen effluvium is not a contagious condition and has nothing to do with bacteria, fungi, or viruses that can be transmitted via a comb or other object. It is a reaction of your own body to an internal or external stressor.
Can you tell from your scalp if it's telogen effluvium?
Not necessarily with the naked eye; the scalp itself usually looks normal with telogen effluvium, without redness, flaking, or inflammation. This distinguishes it from conditions such as dandruff or a fungal infection, where the scalp itself also shows visible symptoms.
What is the difference between telogen effluvium and alopecia areata?
Telogen effluvium is a temporary disruption of the hair growth cycle due to stress or another trigger, with diffuse hair loss all over the scalp. Alopecia areata is an autoimmune disorder where the body attacks its own hair follicles, usually leading to sharply defined, round bald patches instead of diffuse thinning.
Can a relocation or major life change also trigger telogen effluvium?
Yes, even positive or neutral major changes, such as a relocation, a new job, or another significant life event, can be perceived as stress by the body and trigger telogen effluvium. It's not necessarily about negative stress, but about the burden that a change brings.
Should you wash your hair differently during telogen effluvium?
Not necessarily differently, but be careful with aggressive styling, tight tying, or frequent heat use during this period, as hairs already in the resting phase may break more easily or fall out sooner. A mild, consistent routine is sufficient; a special approach is not necessary.
