Eyebrow loss can occur due to an underlying medical condition, such as hormonal or endocrine conditions, autoimmune disorders, genetic diseases, infections, skin conditions, trauma and even an adverse reaction to a medication. A dermatologist can determine the medical reason for eyebrow loss by a thorough examination, including blood tests and a biopsy.
Hormonal and Endocrine Imbalances
Thyroid diseases, hormonal imbalances caused by pregnancy or the use of birth control pills are potential causes of eyebrow loss.
Autoimmune Disorders and Genetic Conditions
An autoimmune disorder, whereby the immune system turns on itself and mistakenly attacks healthy body tissue (such as alopecia, Omenn syndrome and Netherton syndrome), is another reason for eyebrow loss. Genetic disorders are also associated with eyebrow loss, such as Fraser syndrome and Meige syndrome.
Secondary syphilis, whereby the infection spreads into the bloodstream, and leprosy can potentially cause eyebrow loss.
Skin growths and inflammation caused by seborrhoea, psoriasis, eczema or contact dermatitis can hamper the regrowth of eyebrow hair.
Obsessive-compulsive disorders that manifest in repeated rubbing, hair-pulling and excessive plucking can also result in eyebrow hair loss.
Having an adverse effect to a medication can result in the temporary loss of eyebrow hair. Common anti-inflammatory drugs, such as ibuprofen (Motrin and Advil), acetaminophen (Tylenol) and naprosyn (Alleve), have shown to cause eyebrow loss. Medical therapies such as chemotherapy are widely known to cause complete hair loss. Telogen effluvium, a condition resulting in excessive hair loss, also affects the eyebrows.
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