You searched for: “seborrheic dermatitis
seborrheic dermatitis (s) (noun), seborrheic dermatitises; seborrheic dermatitides; seborrheic dermatites (pl)
A form of inflammatory skin rash that results from excess activity of the sebaceous glands in the skin; dermatitis seborrheica; eczema seborrheicum: Seborrheic dermatitis is an acute, long-term inflammatory form of dermatitis, occurring usually on oily skin in areas having large sebaceous glands.

Seborrheic dermatitis is characterized by dry, moist, or greasy scales and by crusting yellowish patches, remissions, exacerbations, and itching.