Hansen's disease, also known as leprosy, is an infection of the skin and nerves caused by the bacterium Mycobacterium leprae. The disease often affects the skin of the eyebrow region, leading to loss of sensation and permanent loss of the eyebrow hairs. There are numerous other rare and uncommon causes of eyebrow hair loss, including vitamin A toxicity, nutritional disorders and other dermatological disorders. If you experience loss of eyebrow hair, see your doctor to evaluate the cause and to discuss a treatment plan. 

Hair loss can occur either in acute or chronic hypervitaminosis A. Loss of eyebrows and eyelashes can occur in chronic hypervitaminosis A which can occur in a number of conditions, either due to enthusiastic overdosing or due to intentional prescription of high doses for diseases such as acne, retinal disorders with night blindness, and others.[116] The cutaneous manifestations include dry, rough, and scaly skin. Chronic hypervitaminosis A is also becoming increasingly common with use of retinoids for various skin disorders. Acitretin has been noted to cause a high incidence of diffuse hair loss.[117] Premature teloptosis may be a prime factor in hair loss induced by retinoids.[98]
See a dermatologist for itchy skin or rashes around your brows. These patches may indicate a skin infection or interaction with a new beauty product or environmental trigger. You could also have inflammation from dermatitis or psoriasis.[32] These conditions don’t actually cause hair loss, but they can lead to it if you rub and scratch the affected areas.
Contact dermatitis causes skin inflammation and when severe it can affect the hair follicles as well. It can either be due to some irritant making contact with the skin of the eyebrows or due to a substance to which a person has an allergy. This gives rise to the two types of contact dermatitis – irritant contact dermatitis or allergic contact dermatitis. Substances that could cause contact dermatitis at the eyebrow includes eye makeup including eyebrow pencils, hair removal creams and waxes, other cosmetics, hair dyes and scalp hair styling products.
Thinning hair, noticeable bald spots, receding hair line, large clumps of hair showing up in your hair brush or shower drain, these are typically things you hear about from men, not women. More and more though, we are contacted by women who are experiencing hair loss who want to know if this is a sign of something wrong with their hormones and how they can fix the problem. Fortunately, hair loss is not a sign of infertility, but is a side effect of hormonal imbalance which can impact your fertility.
FPHL or androgenetic alopecia is the most common cause of hair loss in women and one of the most common chronic problems seen by dermatologists worldwide (Varothai and Bergfeld, 2014). FPHL is a nonscarring form of alopecia in which the frontal hairline is maintained, but there is progressive hair thinning at the vertex of the scalp. Thinning of the hair is secondary to alteration of the hair cycle with shortening of the anagen phase and simultaneous lengthening of telogen. This increase in the resting phase and decrease in the growth phase of the hair cycle results in the miniaturization of hair because long terminal hairs are gradually replaced by short vellus hairs (Messenger and Sinclair, 2006, Sinclair et al., 2011).

Dozens of other causes of eyebrow loss are also possible including a variety of infectious, autoimmune and inflammatory conditions. Consultation with a dermatologist or hair transplant surgeon is recommended. I strongly advise consulting a dermatologist before proceeding to hair transplantation for women over 40 with new onset eyebrow hair loss after age 40.
Thyroid Dysfunction: Since the thyroid gland regulates many body functions by releasing hormones, any disruption in its functioning can cause loss of hair, including eyebrow hair. If your thyroid is underactive, it could cause you to lose the outer third of your eyebrow. The only way to treat thyroid dysfunction is through medication. However, there’s still no guarantee that your eyebrow hair will grow back.
During and after pregnancy, estrogen levels may frequently rise and then dip back down quickly. This sudden dip is what leads to hair loss after giving birth, which can be normal and should stop as hormone levels balance again. If hair loss is accompanied by a myriad of other symptoms post pregnancy, there may be a deeper issue beyond normal hormone fluctuations, such as thyroid function. “But exhaustion, feeling down, difficulty losing weight, intense struggle to produce enough breast milk, and hair loss aren’t always just a normal part of having had a baby,” says Dr. Aviva Romm. If you are experiencing any of these issues post pregnancy, do talk to your doctor about what you are going through.
Alopecia areata: Researchers believe that this is an autoimmune disease. Autoimmune means the body attacks itself. In this case, the body attacks its own hair. This causes smooth, round patches of hair loss on the scalp and other areas of the body. People with alopecia areata are often in excellent health. Most people see their hair re-grow. Dermatologists treat people with this disorder to help the hair re-grow more quickly.
If you’ve overplucked your brows too many times, you may have caused trauma to the follicles in the meantime, signalling not only those hairs you plucked to stop growing back, but also the hairs in surrounding areas. The good news: If the hair follicles aren’t dead, they can possibly be shaken from their resting state with a good brow enhancer. (like WINK  yes of course, we have to say it). There’s no sure bets, but it’s worth a try–plus Wink has a money-back guarantee!
A. Steroids are not for female pattern hair loss but are sometimes used for alopecia areata (spotty hair loss that is different than hair loss due to genetics and aging). Laser combs? There are some reports that low-level light therapy could stimulate hair growth in some people. It's something to try when people feel like they have no other good options. At $350, it's expensive and I'm not sure it's worth the money, but it is safe.
Hair loss in women is not easy to diagnose because it is very often multifactorial in etiology and thus requires well-designed specific steps so that the patient is evaluated properly. The best way to do this is to evaluate the patient in person (rather than sending photos via email or Skype) because the patient gets a chance to meet her doctor to permit the development of a trusting relationship- critical because very often the treatment of hair loss is an involved process that requires a strong doctor-patient relationship.
Hair loss may also occur due to dieting. Franchised diet programs which are designed or administered under the direction of a physician with prescribed meals, dietary supplements and vitamin ingestion have become popular. Sometimes the client is told that vitamins are a necessary part of the program to prevent hair loss associated with dieting. From a dermatologists’s standpoint, however, the vitamins cannot prevent hair loss associated with rapid, significant weight loss. Furthermore, many of these supplements are high in vitamin A which can magnify the hair loss.
Low Level Laser Therapy (LLLT) is a non-invasive, non-surgical scientific approach to fighting hair loss. It is effective against multiple levels and types of hair loss including thinning hair, receding hair line, male and female pattern baldness and various scalp issues. LLLT has been rigorously tested for both safety and effectiveness for well over 30 years and has been in use in many countries throughout the world for over 30 years.
Other hair loss conditions that may be of an autoimmune nature that can involve the loss of eyebrows such as an underactive thyroid or vitiligo are termed “markers of underlying conditions”. It would be a trichologist’s responsibility to highlight these to the GP for further testing, these can also be investigated privately. In addition, there are conditions such as nutritional deficiencies like pernicious anaemia (unable to store B12) and of course anxiety and stress hair loss which can cause an overall reduction in the hair density. Patients attending with this concern often report that their general density is less dense.

Not only that, but plucking, waxing, or threading can also lead to permanent eyebrow loss, ingrown hairs, and infections. With repeated trauma to the hair follicle, your follicle can become damaged and scarred. If this occurs, your hair may never grow back again. Make sure to be extra careful to only pull out the hairs that you want to remove when you are plucking your brows. You should also wash your tweezers with alcohol before you start plucking or seek treatment at a reputable salon to prevent infections.
Tames and Goldenring described a case of bilateral loss of eyebrows and eyelashes in a patient with AIDS-related complex who had smoked crack cocaine. This has been attributed to hot vapors during the process of smoking, and which therefore caused singeing of the brows and lashes. There was a complete reversal once the patient abstained from cocaine.[93]
The Hair Wellness Group’s mission is to provide each client with a personal experience that will leave them “Uplifted” and “ Inspired”. Our unique approach integrates wellness, relaxation, and beauty into one’s lifestyle at all levels. We call this the “Total Approach”. The Hair Wellness Group educates, empowers, and enriches the lifestyle of all seeking optimum results in hair restoration, hair replacement, and scalp rejuvenation.
Finasteride is a 5-alpha-reductase type II inhibitor, and although it is approved by the U.S. Food and Drug Administration (FDA) for the treatment of male androgenetic alopecia, it is not approved for FPHL. Finasteride is significantly teratogenic and has been shown to cause feminization of male fetuses (Bowman et al., 2003) as well as sexual side effects, depression, headache, nausea, and hot flashes (Varothai and Bergfeld, 2014). The decreased conversion of testosterone to DHT causes a build-up of testosterone, which subsequently converts to estradiol and creates a relative estrogen excess, and this could theoretically increase the risk of breast cancer (Kelly et al., 2016). Studies that use low doses (1 mg daily) showed no significant benefit (Kim et al., 2012, Price et al., 2000). However, one study of 37 premenopausal women who were taking a 2.5-mg dose of finasteride daily with an oral contraceptive pill showed improvement of hair loss in 62% of patients (Iorizzo et al., 2006). Another study of 87 pre- and postmenopausal normoandrogenic patients who were taking a 5-mg dose of finasteride per day for 12 months showed a significant increase in both hair density and thickness (Yeon et al., 2011). The effectiveness of finasteride does not seem to differ between pre- and postmenopausal patients (Yeon et al., 2011). Finasteride is classified as pregnancy category X.
Estrogen, the power player in women’s bodies, is your friend when it’s appropriately balanced. It makes you feel energized, helps stabilize your moods and contributes to a healthy sex drive. Yet too much estrogen, which can be caused by weight gain, perimenopause or toxicity from exposure to endocrine disruptors (which are rampant in our food, water and plastic products), can lead to thinning hair. During and after pregnancy, for example, estrogen levels peak and then dip, causing sudden hair loss for many women.

Accurate placement of the grafts is necessary to ensure a good cosmetic result. In the medial third, the needles should be inserted parallel to the brow axis.[203] The follicles should point toward the tip of the nose and the hairs should converge toward each other in the other two segments, that is, the bulbs in the upper part point toward the forehead and in the lower part toward the other eyebrow.[204]
In order to prevent drying and breakage, it’s best to stay away from heat tools, such as hair dryers and straightening irons. Extensions and other styling methods can also weaken your hair and cause early hair loss. If you must dye your hair, choose an all-natural hair color. Artificial chemicals found in dyes and perms can compromise your scalp and hair health. When you wash your hair, always use a nourishing conditioner to keep your scalp healthy and promote healthy hair growth.
What she doesn’t mention is how to regrow your brows after chemo-related brow loss! If you have recently undergone chemotherapy, your brows may be a bit wonky in the beginning, but you still want them, right? They are the frame for your beautiful face. Every October we host a “Buy One Give One for the Cure” campaign, where for every bottle of WINK  sold, we donate one to a cancer survivor. If that’s you, shoot us an email so we can get you hooked up.
When a woman is experiencing hair loss and has PCOS, spironolactone is often prescribed and it can be helpful but it’s important as well to address all these other issues when it comes to PCOS related hair loss. It’s also important to know that there is only a mild correlation of elevated testosterone on a blood test and hair loss. This is likely due to the hypersensitivity of the follicle to androgens in PCOS. Basically we get an exaggerated reaction from a smaller amount of testosterone. 

There is pilosebaceous inflammation[45] with both scarring and non-scarring alopecia depending on the degree of inflammation. Most commonly, there is involvement of the head and neck, though widespread involvement is also seen. Eyebrow loss is a prominent finding and may be the presenting symptom when the eyebrow region is involved in the acute benign form of follicular mucinosis.[46]
Hair loss is one of the most irritating and worrisome issues anyone would ever have to meet with. It is obvious that there are various reasons which may cause hair loss in individuals. One of the causes of hair loss can be a low level of estrogen hormone. There is a connection between estrogen and hair loss. In this current article, we will talk about if low estrogen can cause hair loss and also know of ways to prevent it. Hope this would be a beneficial read for you. 

See the doctor for sudden hair loss. If you suddenly lose your eyebrows, that could be a sign of a more serious problem, particularly if you only lose your eyebrows or eyelashes and not other hair. Sudden loss of eyebrows can be a symptom of eye conditions, skin conditions, systematic disorders, infections, and nutritional deficiencies. Seeing your doctor can help you narrow down the condition.[30]

The startup recently closed its Series A round of funding, with Unilever Ventures, the investment and private-equity vertical of the consumer goods company, stepping in as the lead investor. Unilever was introduced to Nutrafol through investment platform, CircleUp. The investment from Unilever Ventures, along with other strategic partners, will be used to advance research efforts, product development and expand within the medical, salon and e-commerce channels. With continued investment in research and clinical studies, Nutrafol is poised to take the lead in the fragmented multibillion-dollar global hair loss industry.

There are a lot of myths out there about balding men. One of them is that men with MPB are more virile and have higher levels of testosterone. This isn’t necessarily the case. Men with MPB may actually have lower circulating levels of testosterone but higher levels of the enzyme that converts testosterone to DHT. Alternately, you may simply have genes that give you hair follicles that are highly sensitive to testosterone or DHT.

Distress can also come from more than a change in body image. Dlova et al. (2016) found that in a group of black South African women, 52% reported serious worry that others would mistakenly assume that their hair loss was secondary to HIV infection or AIDS. It is critical that clinicians who care for such patients be compassionate and understanding but also have a solid understanding of hair loss so that reasonable expectations can be established and a therapeutic relationship can develop.
Optimal levels of estrogen help to grow full thick hair, while low estrogen levels lead to thin and stalled hair growth, which eventually leads to hair loss. Through the years, a women will go through various cycles of highs and lows in estrogen levels. Puberty is typically associated with high estrogen levels as a woman starts to cycle through menstruation. Pregnancy typically increases hormone production, but once the baby has been delivered the mother can experience a drop in estrogen levels, which can result in thinning and loss of hair. Typically, this corrects itself as the woman's body heals and hormonal regulation returns to normal.  The largest decline in estrogen levels is during menopause. Estrogen is secreted through the ovaries and adrenal glands. When a woman hits menopause, the ovaries’ estrogen production is significantly diminished, which puts an excess burden on the adrenals to produce it. However, as the adrenals are typically overburdened due to stress, symptoms of menopauses like hair loss and hot flashes occur prematurely and excessively for some. Nourishing the body and balancing stress levels will support gentle and graceful transitions.  
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Dutasteride is a 5-alpha-reductase inhibitor that binds both types I and II enzymes. Compared with finasteride, its inhibition of type II enzymes is three times more potent; its inhibition of type I enzymes is 100 times more potent (Clark et al., 2004). Dutasteride is not approved for the treatment of FPHL by the FDA, and ongoing studies on the efficacy of the inhibitor are promising but largely focus on male patients (Gupta and Charrette, 2014, Olsen et al., 2006). A study of women after 3 years of therapy showed that dutasteride may be more effective than finasteride in women under 50 years of age as measured by hair thickness (not hair density) at the center and vertex scalp (Boersma et al., 2014). One case report of a 46-year-old female with FPHL showed some response after 6 months of treatment with a dose of 0.5-mg dutasteride daily despite a minimal response to treatment with finasteride and minoxidil (Olszewska and Rudnicka, 2005). Data with regard to the treatment side effects in women is extremely limited. Dutasteride is classified as pregnancy category X because of teratogenicity and should have the same theoretical risk of breast cancer as mentioned in relation to finasteride (Kelly et al., 2016).

It’s common for women to experience shedding hair after pregnancy. Usually, this is in response to estrogen levels returning to normal, shedding the extra hair grown during pregnancy. Usually, the hair will return to the same thickness it was before you got pregnant. New moms who are not breastfeeding should consider taking hair growth vitamins post-pregnancy too to balance out their hair growth cycle.
In an article on menopause, the University of Maryland Medical Center states, “Estrogen loss can contribute to slackness and dryness in the skin and wrinkles. Many women experience thinning of their hair and some have temporary hair loss.” Meanwhile, this study reports, “It has long been known that estrogens also profoundly alter hair follicle growth … the time has come to pay estrogen-mediated signaling the full attention it deserves in future endocrinological therapy of common hair growth disorders.”
Tames and Goldenring described a case of bilateral loss of eyebrows and eyelashes in a patient with AIDS-related complex who had smoked crack cocaine. This has been attributed to hot vapors during the process of smoking, and which therefore caused singeing of the brows and lashes. There was a complete reversal once the patient abstained from cocaine.[93]
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