I am 23 years old. i gues i have redundant dandruff problem

Patient: I am 23 years old. i gues i have redundant dandruff problem. the scalp dosent flake. but whenever i scratch my head, there is whitish semi sticky stuff at my finger nail tips. i also have lot of hair fall. so i consulted a dermatologist. She gave Q-sera and scalpe shampoo. Q sera to be used daily and shampoo twice a week. But now i am noticing excessive hair fall during wash and throughout eh day. It is most severe on the day i wash hair i feel. What is happening? Is something not suiting me?

Symptoms: Heavy hairfall and whitish stuff when scalp scratched

Doctor: