All You Need To Know About Telogen Effluvium

Telogen effluvium is a type of hair loss that anyone can develop. Triggered by physical or psychological stressors, it is quite common. 

The problem with this kind of hair loss is that it doesn’t occur right away after a stressful event. In fact, more than a few months pass before telogen effluvium even starts. 

As a result, when it happens, many people are caught unaware. They don’t exactly understand what’s causing the hair loss. 

Considering telogen effluvium may be behind it, knowing what it is and what you can do about it is a good idea.

What Is Telogen Effluvium? 

Telogen effluvium is a type of temporary, non-scarring alopecia that results in diffuse thinning of the hair. 

Even though it causes shedding across the entire scalp, according to a review published in the Journal of Clinical and Diagnostic Research, it affects the bitemporal area the most. 

Keep in mind telogen effluvium can affect men and women of all ethnicities, regardless of their age. It is, however, more often reported in women, probably because they tend to notice it more and seek medical attention. 

It’s worth noting that “telogen” refers to the resting phase of the hair growth cycle, whereas “effluvium” refers to the hair falling out in the said stage. 

Telogen is a normal part of the hair growth cycle. At any given time, only around 15% of the hair is in this phase.

Telogen hair
Anagen Hair (R) and Club-Shaped Telogen Hair (L)

However, if the cycle is disrupted due to a stressor, it can push around 70% of the hair into the telogen phase. It can cause you to lose 300 hair strands instead of the usual 100-150 strands.

Bear in mind that this won’t cause instant shedding. That’s because the telogen phase lasts for 3-4 months. 

The hair stays in the resting stage and is finally shed after that time – which is months following the stressful event. 

But the interesting thing to note here is that the shedding of the telogen hair is actually a sign of new hair growth. 

Old hair is pushed out of the scalp only when there’s new hair growing underneath it. So, even though you’re losing hair, you’re growing new hair simultaneously. 

Normal hair loss process
Telogen hair falling out with new anagen hair growing underneath

The effects of the later will, of course, take a few months to become noticeable. 

What Are The Different Forms Of Telogen Effluvium?

Telogen effluvium is mainly classified into two categories, which are as follows:

Acute Telogen Effluvium 

Telogen effluvium is considered acute when it lasts for fewer than 6 months. This kind of hair loss also starts around 3 months after the stressful event (which is not always known). However, it eventually resolves on its own. 

According to research published in Cureus, acute telogen effluvium goes into remission in 95% of the cases.  

Chronic Telogen Effluvium 

When telogen effluvium lasts for more than 6 months, it’s considered chronic. While it’s not exactly understood why, it most commonly affects women between the ages of 30 and 60. 

This kind of telogen effluvium can last for as long as 10 years. And it’s not always continuous; it can come and go away from time to time. 

An important thing to note about chronic telogen effluvium is that even though it causes abnormal hair loss, overall hair density appears unaffected. That’s because lost hair is rapidly replaced by new ones. 

What Causes Telogen Effluvium? 

Telogen effluvium can be caused by a range of physical, mechanical, chemical and environmental stressors. In fact, the cause can be multifactorial, which makes it difficult to pinpoint the exact cause.

Telogen effluvium
Patient with Telogen Effluvium

In general, however, telogen effluvium can occur due to any of the following: 

  • Emotional stress
  • Childbirth 
  • Major surgery 
  • Febrile illness (one accompanied by fever) 
  • Infection 
  • Inflammation 
  • Metabolic stress 
  • Hormonal imbalance 
  • Autoimmune disease 
  • Weight loss 
  • Crash dieting
  • Nutritional deficiency 
  • Eating disorders
  • Toxins 
  • Hair dyes 
  • Trauma 

Telogen effluvium can also be triggered by certain classes of drugs. Some of the examples are as follows: 

  • Blood-thinners 
  • NSAIDs
  • Blood pressure medication (beta-blocker, captopril) 
  • Antithyroid agents (propylthiouracil)
  • Stimulants (amphetamines)
  • Hormonal drugs (oral contraceptives
  • Anti-seizure medication 
  • Retinoid (vitamin A)
  • Psychiatric medication 

Even babies experience a kind of acute telogen effluvium due to hormonal changes following birth. 

Types of Telogen Effluvium 

Telogen effluvium can have different types depending on the cause. These were defined by the dermatopathologist John T. Headington in his research titled “Telogen Effluvium. New Concepts and Review.” 

Here’s a summary of them: 

  • Immediate Anagen Release: It refers to the premature shifting of hair follicles from the anagen to telogen phase. This type of telogen effluvium is believed to occur due to fever or medication. 
  • Delayed Anagen Release: Also termed telogen gravidarum, it occurs after childbirth due to a drop in the oestrogen levels. It usually occurs 2-3 months after birth. However, sometimes, it’s delayed for 6 months. 
  • Short Anagen: Due to unknown reasons, the duration of the anagen phase is shortened. As a result, more hair enters the telogen phase, which causes abnormal shedding. It results in chronic effluvium. 
  • Immediate Telogen Release: It results in the shortening of the telogen phase, which results in the release of club hair after 4-6 weeks. It happens with the use of minoxidil
  • Delayed Telogen Release: It’s when the hair is retained in the telogen phase for a longer period (than usual). However, once that ends, abnormal shedding results. This happens in case of seasonal hair loss

Essentially, telogen effluvium results from an abnormality in the hair growth cycle. And that can occur due to many factors. 

Is Telogen Effluvium Common? 

It’s not exactly known how prevalent telogen effluvium is, but it’s considered a “common” type of hair loss. Research shows that it’s the most common cause of diffuse hair loss.

Many of telogen effluvium’s triggers are not always avoidable. So, there’s a good chance that you’ll develop it at some point in your life. 

Therefore, it’s quite common, maybe even more so in women. 

How Do You Know If You Have Telogen Effluvium? 

Telogen effluvium is characterised by abnormal diffuse shedding. Many people notice more hair on their pillows, in the hairbrush, drain or, in general, around the house. 

It can happen quite suddenly as well, so that’s another indicator. And while it can cause overall thinning, it’s unlikely to cause baldness. 

You can consider taking a look at the bulb of the hair. If it’s club hair, the colour of the root will be lighter than the rest of the hair. 

In some cases, trichodynia – a painful, burning sensation of the scalp, also accompanies telogen effluvium. So, that may be another indicator of this type of hair loss (it also happens in androgenetic alopecia). 

DermNet NZ reports another possible sign of telogen effluvium – a Beau line. It refers to a horizontal indentation or groove in the fingernails that can develop due to stress.

Beaus line
Beau Line on Fingernail

The position of the line can show when the stressful event actually took place. 

How Long Does Telogen Effluvium Last?

Telogen effluvium usually lasts for 3-6 months (unless it’s chronic). As hair falls out, new hair will grow underneath. So, regrowth will also start after 3-6 months. 

It can, however, take 1-1.5 years for your hair to completely recover.

Keep in mind that telogen effluvium won’t stop unless the underlying problem has been resolved. 

While it’s not always known, this type of hair loss usually resolves on its own. And since it’s reversible, your hair will start to grow again. 

What Does Telogen Effluvium Regrowth Look Like?

After telogen effluvium has stopped, you’ll eventually start to notice the growth of short, fine, fringe hair. 

One research published in the Anais Brasileiros de Dermatologia proposed that hair grows in a triad (front, temples and back of the head) following the resolution of telogen effluvium. 

And researchers noted the growth of fine hair fringes in all these areas.

Telogen effluvium regrowth
Hair Regrowth After Telogen Effluvium

How To Fix Telogen Effluvium? 

Since telogen effluvium is self-limiting, it usually doesn’t require any treatment. Nevertheless, you should seek medical attention.

That’s because telogen effluvium may be triggered by an underlying health problem. And if it’s not treated, your hair loss will continue. For instance, thyroid disorders can cause chronic telogen effluvium. 

Similarly, nutritional deficiencies can cause telogen effluvium. And hair loss will continue unless the problem is addressed through necessary changes to the diet. 

However, if the problem is likely to fix itself, like hormonal changes after pregnancy, you might not need to do anything for the telogen effluvium to resolve. 

While no treatment might be needed, your doctor might recommend the use of minoxidil to stimulate hair growth. 

This drug works by dilating blood vessels to deliver more nutrients to the hair follicles. Although minoxidil is usually reserved for chronic telogen effluvium. 

You might also be recommended platelet-rich plasma injections for promoting regrowth. 

scalp injection
Platelet-Rich Plasma Injections

Keep in mind that a surgical intervention like hair transplant is not really required because telogen effluvium is reversible. 

While you’re experiencing telogen effluvium, it’s important that you practise gentle hair care. For instance, you should avoid excessive use of heat-styling tools. 

You should also consider using products that don’t have as many “harsh” chemicals in them. 

Can Telogen Effluvium Be Cured?

Telogen effluvium is usually self-correcting and completely reversible on its own. Therefore, it doesn’t require any “cure.” 

Still, keep in mind that you shouldn’t avoid a medical consultation. That’s because hair loss might be fuelled by a health problem. 

How To Prevent Telogen Effluvium?

Telogen effluvium can be caused by a combination of internal and external factors, so it’s not always possible to prevent it. 

In some instances, you can, however, avoid it. For example, if you have stress hair loss due to telogen effluvium, you should consider seeking professional help to manage it. 

But, again, it’s not always possible. 

How To Diagnose Telogen Effluvium? 

Other than asking about your history, your doctor will perform a physical exam to check for signs of telogen effluvium. They may do a dermoscopy or videodermatoscopy for that. 

This can also be accompanied by some diagnostic tests, such as the: 

CBC and thyrotropin tests might also be done to determine the root cause of the problem. 

Scalp biopsy is not usually needed, but it is done in some cases. 

How To Hide Telogen Effluvium? 

While you’re recovering and regrowing your hair, you can hide telogen effluvium through the following: 

  • Wigs 
  • Toppers
  • Hair fibres 
  • New haircut/hairstyle 
  • Volumising products 
  • Scarves, hats, and caps 

These measures may help you cope better with hair loss due to telogen effluvium. 


Telogen effluvium is a common type of hair loss that results in temporary thinning of the hair. Fortunately, though, it’s usually self-correcting, so your hair will grow back after a few months. 

Sometimes, however, this kind of hair loss can last for a very long time. And it may be because of another health problem. Telogen effluvium might not stop until that problem is addressed. 

Therefore, it’s important that you consult a board-certified medical professional. Treatment, if required, will follow an accurate diagnosis of the problem.

Reviewed and Approved by Trichologist Yaprak Yazan


Can you get telogen effluvium twice?

It’s possible for you to experience telogen effluvium more than once. That’s because it can be triggered by many factors.

Does chronic telogen effluvium ever stop?

While chronic telogen effluvium can last for as long as a decade, it has the potential to stop. It might be occurring due to an underlying problem, which is why you must seek professional help.

Can telogen effluvium look like pattern baldness?

Telogen effluvium can resemble pattern baldness if the hair loss is diffuse in both cases. However, on closer examination, telogen hair is quite different from androgenetic alopecia. Hair follicles don’t miniaturise in telogen effluvium.

Does telogen effluvium get worse before it gets better?

Once telogen effluvium starts, it can worsen and reach a peak before it starts to get better.

What is the best shampoo for telogen effluvium?

A particular hair loss shampoo is unlikely to help you with telogen effluvium. However, it’s important to use a mild one so that it doesn’t cause further damage to your hair.

Can I dye my hair with telogen effluvium?

Hair dyes can potentially cause telogen effluvium, so you should talk to your doctor before using one.

Can telogen effluvium cause receding hairline?

Telogen effluvium affects the front and temporal areas on the scalp more, so it can cause thinning. However, it won’t necessarily cause a recession in your hairline.

What vitamins treat telogen effluvium?

Unless a vitamin deficiency is causing telogen effluvium, vitamins or supplements aren’t going to help you.

Does telogen effluvium affect body hair?

In more severe cases, telogen effluvium can affect the scalp, facial and body hair.

Does hair still grow during telogen effluvium?

According to DermNet NZ, new hair will continue to grow even during telogen effluvium. As telogen hair is shedding, new hair is growing underneath.

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