Hidradenitis suppurativa can affect one spot or multiple areas of the body. Signs and symptoms of hidradenitis suppurativa include: 1  Blackheads. Small pitted areas of skin containing blackheads â often appearing in pairs or a double-barreled pattern â are a common feature.  Red, tender bumps. These bumps often enlarge, break open and drain pus.
Sebum is an oily substance that's secreted by sebaceous glands to keep skin moisturized. Too much leads to oily skin and too little leads to dry skin. Sebum is an oily substance that's secreted by sebaceous glands to keep skin moisturized.
Source â patient. âSebumâ is the Latin word for âfatâ. It is the oily secretion of the Sebaceous Glands which keeps the hair and skin moisturized and prevents them from cracking, turning dry and getting brittle. The sebum comprises of lipids, wax and clusters of dead fat-producing cells.