Seborrhea

n. excessive discharge of sebum, excessive discharge of an oily or fatty substance from the sebaceous glands

Seborrheic dermatitis is a skin disorder affecting the scalp, face and trunk causing scaly, flaky, itchy, red skin. It particularly affects the sebum-gland rich areas of skin.
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Seborrhea /seb·or·rhea/ 1. excessive secretion of sebum. 2. seborrheic dermatitis.seborrhe´alseborrhe´ic seborrhea sic´ca dry, scaly seborrheic [more]Seborrhea - Community and Resources

Noun
1. a condition in which overactivity of the sebaceous glands causes the skin to become oily
(hypernym) skin disease, disease of the skin, skin disorder, skin problem, skin condition

(n.)
A morbidly increased discharge of sebaceous matter upon the skin; stearrhea.