Eyebrow hair loss can occur due to various triggers, some of which are temporary and reversible, while others necessitate clinical attention. One of the most common culprits is over-plucking. Consistent trauma to the hair follicles from overzealous shaping can compromise the follicles, resulting in thinning brows in severe instances. Skin conditions such as seborrheic dermatitis can inflame the eyebrow region, disrupting the natural hair growth cycle.

Another prevalent cause is alopecia areata, a condition where the body’s defense mechanism destroys hair follicles, leading to focal thinning, often affecting the eyebrows. Hormonal thyroid disorders—both hypothyroidism and overactive thyroid—are strongly associated with brow recession, particularly the tail end of the brow, a well-documented symptom of low thyroid function.

Micronutrient shortfalls can also contribute significantly. Insufficient levels key nutrients like zinc can degrade hair follicle integrity, triggering premature fallout. This pattern is frequently observed in individuals with eating disorders.

Fluctuations in hormone levels—such as those occurring during perimenopause—can temporarily disrupt eyebrow hair loss as the body adjusts to new hormonal balances.

Certain medications—including chemotherapy agents—may list follicular shedding as a potential complication. Infections, کاشت ابرو در کرج especially ringworm, can invade the skin around the eyebrows, destroying follicles and preventing regrowth.

Injuries such as burns can irreversibly destroy hair follicles in the affected zones, making regrowth unlikely.

Emotional strain—including trauma—can induce stress-induced shedding, a condition where hair growth cycles enter early a resting phase, leading to excessive loss in the entire hairline.

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

If you experience rapid thinning, it’s advisable to see a healthcare professional to pinpoint the underlying issue and discuss viable treatments.