which disorder is caused by excessive secretions of the sebaceous glands
Disorders of the Sebaceous (Oil) Glands. Seborrhea (seb-o-REE-ah) is a skin condition caused by overactivity and excessive secretion of the sebaceous glands. An oily, or shiny, condition of the nose, forehead, or scalp indicates the presence of seborrhea.ollowing are common disorders of the sebaceous (oil) glands: Comedones (KOM-e-donz), or blackheads, are a worm-like mass of keratinized cells and hardened sebum appearing most frequently on the face, chest, shoulders, and back. Blackheads accompanied by pimples often occur in youths between the ages of 13 and 20.