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.
The extra skin cells and sebum form a small blockage beneath the surface of the skin that pushes outward, often in the form of small, upraised red bulges with white centers -- or what we (not so) fondly refer to as pimples. Our body's other main secretion, sweat, exits the body through two different types of glands.ores, Sebum and Sweat Glands. We have pores all over our bodies, tiny holes that contain hair follicles and act as outlets for sweat and sebum to leave the body.