you seem to have seborrheic dermatitis
which typically affects areas of the skin where sebaceous glands appear in high frequency and are most active. common sites of involvement are , scalp, the scalp margin , eyebrows, eyelashes, mustache and beard, forehead, the nasolabial folds , the postauricular creases, the chest and in the body folds, including the axillae, navel,groin, inframammary and anogenital areas.
treatment includes anti fungal shampoo, or tar based if adherant scales, overnight olive oil to soften the scales.topical steriod lotion or ointment for scalp
for the body areas antifungal shampoo, ketoconazole
In severe cases oral isotretinoin
can be used.
Refer a dermatologist
for exact diagnosis and treatment
hope this helps you