Hi Andrea, Welcome to HealthcareMagic!
Symptoms you have described seem not due to simple dandruff (pityriasis
capitis). In dandruff, flakes are white-grey & there is minimal itching; it usually resolves by OTC antidandruff shampoos (like head & shoulders). Probably you suffer from seborroehic dermatitis
or scalp psoriasis
. A dermatological consultation will be useful for you. Still you may try Ketoconazole
1% shampoo (available OTC) 4-5 times a week. It may also help in hair loss. Please let me know the results in say 2 weeks.