Eyebrow Hair Loss: Why It Happens And Does It Grow Back
Last reviewed on 6 August 2026. We review our treatment guides every six months to keep them accurate.
Key points
Thinning or missing eyebrows have a long list of possible causes, so eyebrow hair loss is best thought of as a sign to explain rather than a diagnosis in itself. The medical term for it is madarosis.
The most common everyday causes are cosmetic: years of over-plucking, threading or waxing, and damage from tattooing or microblading, which can thin the brows and, over time, stop some hairs growing back.
Skin and hair-loss conditions matter too: eczema, psoriasis, alopecia areata and, importantly, frontal fibrosing alopecia can all affect the brows, the last of these often before the scalp.
General health can show in the eyebrows. Thyroid problems classically thin the outer third of the brow, and low iron, zinc or protein can contribute, which is why a doctor may check for an underlying cause.
Whether it grows back depends on the cause. A 2012 review states that in non-scarring cases "generally regrowth of hair occurs after treatment of the primary disorder", but scarring conditions such as frontal fibrosing alopecia cause permanent loss.
Treatment starts with the cause. For thinning brows, topical minoxidil has randomised-trial evidence for eyebrow enhancement, and cosmetic options such as microblading or makeup can help in the meantime.
For settled, permanent loss, an eyebrow transplant can restore the shape, but only once any underlying condition is under control. Persistent or patchy eyebrow loss is worth having checked by a GP or dermatologist.
Eyebrows frame the face, so losing them, whether they are thinning at the edges, disappearing in patches, or simply never grew back after years of plucking, tends to be noticed and worried about. The good news is that a lot of eyebrow hair loss is reversible once the cause is dealt with. The important part is working out what that cause is, because a few conditions cause permanent loss and are worth catching early.
This guide explains what eyebrow hair loss is, the many things that cause it, whether the hair grows back, the scarring condition to be aware of, how it is treated, and when an eyebrow transplant is an option. Because the causes range from cosmetic habits to thyroid disease, anything persistent is worth discussing with a doctor.
What is eyebrow hair loss?
Doctors call loss of the eyebrows, or eyelashes, madarosis. As the review "Madarosis: A Marker of Many Maladies" explains, it "refers to loss of eyebrows or eyelashes", and it is a clinical sign that turns up in a wide range of conditions rather than a single disease. That is the key idea: eyebrow loss is a symptom with many possible explanations, from the entirely cosmetic to the medical, and the pattern of loss often gives a clue to the cause.
Eyebrow hair also behaves differently from scalp hair. Each brow hair has a much shorter growth cycle and a naturally short maximum length, which is why brows do not grow indefinitely, and why they can take a few months to recover fully once something has knocked them back.
What causes eyebrow hair loss?
Eyebrow loss has many causes: cosmetic damage like plucking and microblading, skin conditions, alopecia areata, frontal fibrosing alopecia, thyroid problems, nutritional deficiencies, medicines and ageing.
The madarosis review groups the causes into several families, and it helps to think of them that way:
Cosmetic and mechanical damage. Repeated plucking, threading, waxing and tinting, and tattooing or microblading, are among the most common everyday causes. Persistent trauma to the follicles can eventually stop some hairs regrowing. Compulsive pulling of the brows, a condition called trichotillomania, produces irregular patchy loss.
Skin conditions. Eczema (atopic dermatitis), psoriasis and seborrhoeic dermatitis around the brows can all cause hair to come away, partly through the constant rubbing and scratching an itchy area invites. The review notes that loss of the outer eyebrow from persistent rubbing is well recognised.
Hair-loss conditions. Alopecia areata, an autoimmune condition, can cause smooth patches of brow loss. Frontal fibrosing alopecia, a scarring condition covered below, very commonly affects the eyebrows, often as an early sign before the hairline is affected.
Thyroid and other systemic causes. Thyroid disease, particularly an underactive thyroid, classically thins the outer third of the eyebrow, a pattern old textbooks call the Queen Anne or Hertoghe sign. Nutritional shortfalls such as low iron, zinc, biotin or protein can contribute, as can some chronic illnesses. Our guide on thyroid and hair loss covers that link.
Medicines, illness and ageing. Chemotherapy and a number of other drugs can cause eyebrow loss, a general telogen effluvium type of shedding can thin the brows along with the scalp after illness or stress, and eyebrows naturally become sparser with age.
Because the list is so varied, the pattern matters. Loss confined to the outer third points one way, smooth round patches another, and a receding frontal hairline with brow loss raises the possibility of frontal fibrosing alopecia. This is exactly why a doctor examines the brows and often the scalp, and may run blood tests, rather than treating every case the same way.
Does eyebrow hair grow back?
For most causes, yes, but it depends entirely on whether the follicles have been scarred. The review draws the crucial line clearly: in non-scarring madarosis, "generally regrowth of hair occurs after treatment of the primary disorder", whereas scarring conditions cause permanent loss.
So brow loss from a thyroid problem, a nutritional deficiency, alopecia areata, eczema or a bout of telogen effluvium will usually recover once the underlying issue is treated, though it can take several months to look normal again. Over-plucked or over-treated brows sit in a grey area: they often recover if the follicles are simply resting, but decades of plucking, or aggressive tattooing and microblading, can damage follicles enough that regrowth becomes slow, patchy or, in some spots, permanent. The one group that does not recover on its own is scarring loss, which is why the next condition matters.
The scarring exception: frontal fibrosing alopecia
The most important cause not to miss is frontal fibrosing alopecia (FFA), a scarring hair-loss condition that has become much more common in recent years, mainly in women around and after the menopause. What makes it relevant here is that the eyebrows are very often affected, and frequently before the scalp, so unexplained thinning or loss of the eyebrows can be the first warning sign.
Because FFA scars the follicles, the hair it takes does not grow back, which is why catching it early matters: treatment aims to halt its progress and protect the hair that remains rather than to regrow what is lost. If your eyebrows are thinning for no obvious reason, especially alongside any recession at the frontal hairline or a change in the skin there, it is worth asking a doctor specifically about FFA. Our guide on frontal fibrosing alopecia explains it in full.
How is eyebrow hair loss treated?
Treatment follows the cause, so the first and most important step is to identify it. Correcting a thyroid problem or a nutritional deficiency, treating eczema or psoriasis around the brows, managing alopecia areata, or simply stopping the plucking and tattooing that is damaging them, is what allows non-scarring brow loss to recover.
Where the brows are thin and the follicles are intact, there are treatments aimed at encouraging growth. The best evidenced is topical minoxidil, the same drug used for scalp hair, applied off-label to the brows. A 2024 review of the trials found that randomised controlled studies, beginning with a landmark 2014 split-face trial by Lee and colleagues, show topical minoxidil significantly improves eyebrow thickness and hair count compared with placebo. A related eyelash medicine, bimatoprost, has performed comparably in head-to-head studies. Both are used off-label on the eyebrows, should be used with care near the eyes, and are worth discussing with a doctor rather than self-prescribing. The many over-the-counter "brow growth serums" are far less well evidenced, and some rely on the same bimatoprost-like ingredients without saying so.
While the hair recovers, or where loss is permanent, cosmetic options restore the appearance: eyebrow pencils and powders, and semi-permanent techniques such as microblading, can rebuild a natural-looking brow. The one caution is that microblading and tattooing on already-fragile brows can add to the damage, so they are best considered once any active cause is settled.
Can you have an eyebrow transplant?
Yes. For eyebrows that are permanently thin or gone, and where the cause is stable, an eyebrow transplant can restore the shape by moving a person's own hair follicles, usually taken from the back of the scalp, into the brow area. As the review notes, follicular unit transplantation can help restore appearance in permanent cases, and it is the same follicle-by-follicle principle used in scalp hair transplants.
There are two important conditions. First, any underlying disease has to be controlled first: transplanting into an active scarring condition such as frontal fibrosing alopecia risks the graft being lost to the same process, so surgeons want the condition quiet and stable before considering surgery. Second, expectations need to be realistic, since transplanted scalp hairs keep some of their original character and usually need regular trimming and training to sit like brow hair. Whether a transplant is suitable is a decision for a proper consultation and assessment, not something to judge from an article.
When should I see a doctor?
It is worth seeing a GP or dermatologist if your eyebrows are thinning or falling out without an obvious cause, if the loss is patchy or one-sided, if it is spreading, or if it comes with other symptoms such as tiredness, weight change or scalp hair loss that might point to a thyroid or other medical cause. Mention it specifically if you also notice your frontal hairline receding, as that combination raises the possibility of frontal fibrosing alopecia, where early treatment matters. Getting the cause identified is what makes treatment work, because cosmetic, medical and scarring causes are managed very differently.
Where does this leave eyebrow hair loss?
Most eyebrow hair loss is treatable and much of it is reversible. Because the brows can be affected by everything from over-plucking to thyroid disease, the key is to identify the cause: correct it, and non-scarring loss usually recovers, helped where needed by topical minoxidil and by cosmetic options while it does. The exception to keep in mind is scarring loss, above all frontal fibrosing alopecia, which is permanent and worth catching early, and for which an eyebrow transplant may later be an option once things are stable.
If your eyebrows are thinning and you are not sure why, a GP or dermatologist can examine them, look for an underlying cause and set out the right approach, which is a better starting point than a brow serum bought on hope.
Frequently asked questions
Why am I losing my eyebrow hair?
There are many possible reasons, which is why doctors treat eyebrow loss as a sign to explain rather than a diagnosis. Common causes include years of plucking, threading or microblading, skin conditions such as eczema and psoriasis, hair-loss conditions such as alopecia areata and frontal fibrosing alopecia, thyroid problems, nutritional deficiencies, some medicines, and ageing. The pattern of loss often gives a clue, so it is worth having persistent or unexplained loss checked.
Do eyebrows grow back?
Usually, if the cause is not a scarring one. A 2012 review notes that in non-scarring cases regrowth generally occurs once the underlying disorder is treated, though it can take a few months. Over-plucked brows often recover but may be slow or patchy after years of damage. The exception is scarring conditions such as frontal fibrosing alopecia, where the follicles are destroyed and the hair does not grow back, which is why early diagnosis matters.
Does minoxidil work on eyebrows?
There is randomised-trial evidence that it can help. Topical minoxidil, the scalp hair-loss treatment, has been shown in controlled studies to improve eyebrow thickness and hair count compared with placebo when applied to thinning brows, and it is used off-label for this. It needs to be used carefully near the eyes and is best discussed with a doctor. It helps thinning brows with working follicles; it cannot regrow hair where the follicle has scarred.
Can eyebrow loss be a sign of a thyroid problem?
It can. Thinning of the outer third of the eyebrow is a recognised sign associated with an underactive thyroid, sometimes called the Queen Anne or Hertoghe sign, though it is not proof of thyroid disease on its own. If eyebrow thinning comes with symptoms such as tiredness, weight gain, feeling cold or scalp hair loss, it is worth asking your GP for a thyroid check.
Is an eyebrow transplant permanent?
An eyebrow transplant moves your own hair follicles into the brow, and those follicles are generally permanent once established, so the result is long-lasting. It is only suitable for stable, permanent loss and where any underlying condition, such as a scarring alopecia, is controlled first. Transplanted hairs keep some scalp-hair character and usually need regular trimming. Suitability is decided at a proper consultation.
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