Greetings. DHT crystals - I guess you have been ill informed. It could be granular dandruff / sebum collection / or folliculitis of the scalp with pustules . You should use an antifungal based shampoo - regularly - twice a week. See a qualified dermatologist near you for adequate diagnosis and treatment. Hope this helps
Health Tips
(Caution: do not be lured by unrealistic claims and offers made by quacks who claim to be specialists in trichology n cosmetic sciences or even saloons. Make sure u are treated by a qualified dermatologist). Warm regards, Dr Govind Suresh Mittal, Bengaluru.