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.
These glands are generally located in the hairy parts of the body. These are connected to the hair follicles over the skin. The gland can also be found in non-hairy regions of the skin, such as the eyes, nipples, Labia Minora, penis and nose.eborrhea. This disease of the sebaceous glands leads to over-secretion of sebum. It may also bring about a change in the sebum quality. This gives rise to scales or crusts on the skin.