It seems you are having seborrheic dermatitis
. Usually with shampoo based therapy, dandruff resolves. however once you get a good result, you need to continue with these shampoos to prevent dandruff from coming back. Your hair fall
could be due to dandruff. To treat dandruff-
Use antifungal and salicylic acid/tar based shampoo(konaz ct/ salisia kt shampoo) atleast thrice in a week
Use steroid antifungal lotion over scalp twice in a day(like candid b lotion)
If the above therapy does n't help, you can consider consulting a dermatologist
to start you on oral antifungal
for few days.
Hope that answers your query. Take care.