Eyebrow hair loss can occur due to multiple underlying causes, some of which are temporary and reversible, while others require professional intervention. One of the most common culprits is aggressive grooming. Frequent irritation to the hair follicles from harsh beauty routines can compromise the follicles, resulting in thinning brows in severe instances. Skin conditions such as eczema can disturb the eyebrow region, impeding the natural hair growth cycle.

Another prevalent cause is alopecia areata, a condition where the body’s antibody response attacks hair follicles, leading to sudden patchy loss, often affecting the eyebrows. Thyroid imbalances—both hypothyroidism and hyperthyroidism—are strongly associated with eyebrow thinning, particularly the outer third of the brow, a hallmark sign of an underactive gland.

Dietary deficiencies can also contribute significantly. Insufficient levels key nutrients like zinc can compromise hair follicle integrity, triggering increased shedding. This pattern is frequently observed in individuals with post-illness recovery.

Hormonal shifts—such as those occurring during perimenopause—can trigger eyebrow hair loss as the body adjusts to new hormonal balances.

Certain medications—including chemotherapy agents—may list brow thinning as a potential complication. Microbial invasions, especially tinea capitis affecting the brows, can colonize the skin around the eyebrows, destroying follicles and کاشت ابرو در تهران preventing regrowth.

Scarring events such as lacerations can disable hair follicles in the affected zones, making regrowth unlikely.

Physical stressors—including illness—can induce telogen effluvium, a condition where many hair roots enter early a resting phase, leading to widespread shedding in the entire hairline.

Finally, senescence slows down hair growth rate and thins eyebrow density over time, resulting in lighter brows as we grow older.

If you experience sudden eyebrow loss, it’s advisable to consult a dermatologist to determine the triggering factor and discuss viable treatments.