Hi
Fungal infections and seborrheic dermatitis may present with scales. Are scales present over the area? Are there other signs of hair loss in other parts of the body?
A dermatologic consult is necessary just to identify the specific cause for your condition. This may be an underlying fungal infection or it could be a hair follicle problem. At this point, we can not readily tell as there seems to be no redness or itchiness associated with the condition.
Have you applied anything on your eyebrows? Have you used a new brand of eye liner, shampoo, dye?
no its not red it just that hair keep falling off
Hi
There may be an underlying skin condition here. Are there any redness or scaling over the affected area? The fact that only the left eye brow is affected may suggest that there may be an infection or inflammation going on.
Have this assessed by your dermatologist. You may need topical medications for this. Differentials will be a fungal infection and seborrheic dermatitis.