7 Reasons Your Eyebrows Are Thinning, According to Dermatologists

Over-plucking or Grooming

When you spend time in front of a mirror—especially a magnified one—it’s easy to overthink every last hair. It only takes one plucking oopsie to throw the balance off, and before you know it, you’re over-correcting your arches until there's barely anything left.

It’s happened to the best of us, but luckily, one aggressive pluck session won’t ruin your arches for good. However, doing it too often could cause long-term thinning. “It’s repeated trauma that can ultimately cause the root of your hair follicle to stop functioning properly,” says Mikailov. “Ultimately, the stem cells that create new hair stop regenerating.”

If your brows are suffering from over-grooming, the first step to regrowing overplucked eyebrows is easy: put down the tweezers. Let your eyebrows grow back the best they can, and stop attacking every errant hair if you know you won’t be able to help going hunting for more.

If you still have some thin patches or the regrowth just isn’t happening, there’s still hope. Dermatologist-prescribed Latisse and Rogaine can both help fill out plucked brows. Mikailov also recommends Folliflo by Cell Accel Eyelash and Brow Enhancing Serum ($27), an over-the-counter serum formulated with castor oil and panax ginseng (known for promoting hair growth) to help stimulate hair growth naturally.

Underlying Skin Conditions

Those with eczema or psoriasis will likely not be surprised to hear this—these chronic skin conditions can exacerbate hair thinning, both on your scalp and your brows. If you do have one of these conditions, you’ve likely already noticed it in the form of itchy rashes. If you don’t think you do, but you’re experiencing itchy, inflamed, flaky skin under and around your brows, it might be worth having a dermatologist look at it. Any scratching or rubbing that you're doing might cause hair to fall out. 

Once you nail down what's causing the skin irritation, stopping hair loss is all about treating the condition. “I always look to see if there is any underlying skin condition affecting the eyebrows, surrounding skin, and also scalp,” says dermatologist Robin Blum, MD, FAAD. “I also use a handheld device called a dermatoscope to get a better visualization of the hair follicles and surrounding skin. If there is inflammation in the area of hair thinning, that can be treated with either topical, intralesional, or oral steroids."

Autoimmune Disorders

Autoimmune disorders like hyper- and hypothyroidism, lupus, or androgenetic alopecia can also cause eyebrow thinning. While these conditions mostly surface in middle age, they can also be genetic and hormone-related, and not everyone is the same. “The most important thing I do when someone comes to me for eyebrow thinning is to take an in-depth medical assessment of the thinning,” says Blum. “I take a full medical history and ask about family history as well.” 

In this case, early detection is best. “Treatment can be difficult, so addressing it early is recommended,” says dermatologist Cheshana Kindred MD, FAAD. “This is one of the few cases in which treating the underlying condition does not automatically reverse thinning eyebrows.” Once you’ve addressed your health (which should always be your first priority), a hair growth treatment like Latisse could help to regrow lost brow volume.  

Aging

Aging affects us all in different ways, but loss of hair density is a very common occurrence. With time, our hair follicles aren’t regenerating or maintaining hair as well and you may notice a thinner or more brittle quality to your hair. Hormones play a role here, too. “People typically start to see thinning in their 40s with the decline of their testosterone or estrogen levels,” says Blum. 

We can’t stop time, but we can find ways to fill out brows that have lost a little volume over the years. Blum recommends tinting the hair for a darker appearance or looking into microblading—a kind of semi-permanent makeup, eyebrow tattoo that mimics the look of individual hairs with fine, tattooed strokes. 

Nutritional Deficiencies

When your body is deficient in necessary vitamins, it tends to draw what it can from non-essential functions. Hair growth is one of those functions. For example, vitamin D deficiency is common in American adults and can cause eyebrow thinning. Additionally, Vitamin D is needed to build bone density, control infection, and lower the risk of heart disease and certain cancers. Your body would much rather protect you from disease than make sure your brows are looking good, so it takes vitamin D from your hair follicles to keep everything in working order.

Other common deficiencies that your body might be compensating for are zinc, selenium, and iron. “You’ll want to seek out a nutritional diet with essential vitamins or supplement the diet with the appropriate vitamin,” says Blum. That could mean making a little more time for sunshine and eating more red meats and legumes, or it could mean making a daily supplement (like the Foligain Stimulating Supplement for Thinning Hair ($28), which contains hair-thickening super ingredients like folate, biotin, and zinc) part of your routine. Your hair won't grow back overnight, but you should notice thinning start to slow. 

Stress

It can be frustrating to learn about all the ways stress can wreak havoc on our minds and bodies. Unfortunately, hair loss due to stress is another unexpected side effect of being overworked or not spending enough time on mental health and mindfulness. 

When you’re stressed out or upset, your body produces a stress hormone called cortisol. While very helpful for giving us the adrenaline boost we might need to outrun a predator, it can cause some non-essential functions like hair growth to kick into “rest mode.” While you can’t get rid of cortisol (nor would you want to), you can learn to manage it. “If the cause of your eyebrow thinning is stress or picking, it’s best to seek out stress management therapy,” suggests Blum.

Trauma

If you have experienced physical or emotional trauma of any kind, that, too, can be the reason for your thinning brows. This condition is known as telogen effluvium or sudden hair loss. According to derms, telogen effluvium is reversible and can be treated with over-the-counter medication and management of stress. If hair doesn't grow back within three to six months, you and your doctor might need to discuss hormone replacement therapy.