I'm facing hair fall for couple of months. i already have seen a doctor. she has told me to treat my dandruff. but i'm still facing hair fall.

Many possibilities: If your dandruff is still active that can be one reason. Other reasons include so i read problems, weight loss stress approximately 3 months before the hair loss began, and genetics. Have you seen a dermatologist who specializes in hair. You clearly need a diagnosis and see if there are any treatments available. Blood test need to be done including the thyroid, CBC ferritin.