There are so many reasons for hair fall. Common reasons are Dandruff, malnutrition, Hormonal imbalance, associated illnesses like
thyroid etc.
So for that u should consult near by doctor. If any other illness is not present then take biotin supplements like Tab Follihair 1 Daily. Also take Tab Tonofolic Z 1-0-1. For itching in head use Danket shampoo 2 times in week.