Hi !
Thanks for your query. You could be having some other scalp dermatitis like psoriasis etc.
Next Steps
Clinical photographs would have been helpful to diagnose the problem and suggest treatment. Consult on private chat with clinical photographs for personalised treatment.
Health Tips
Following health feed will be helpful : "Understanding Dandruff" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/understanding-dandruff-8830/post