Seborrheic dermatitis is a condition that happens due to excessive oil secretion from our sebaceous glands on scalp along with overgrowth of certain organisms.
It is characterized by great,yellowish flaky scales along with excessive itching.
It can involve face as well as the trunk.
Patients with epilepsy have a slightly increased risk of seborrheic dermatitis.
Also certain conditions like atopic dermatitis, psoriasis etc can also be like seborrheic dermatitis.
Use of certain antifungal shampoos and certain creams like help maintaining of reducing it.
Also check your blood sugar level in case of recurrence.
I wud advice you to see a dermatologist since new medicines have cum up that help in gud control of seborrheic dermatitis.