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.
Sebum is the filmy, sticky substance produced by the sebaceous glands. These glands often are found in the hair follicles and are responsible for keeping the skin's surface soft by preventing water loss.However, when produced in excess, sebum can cause the skin to appear oily and clog the pores.tep 3. Apply a skin treatment product designed to remove sebum from pores. These include products with salicylic acid and benzoyl peroxide, both of which can be purchased over the counter. Salicylic acid encourages exfoliation of the skin's pores by causing excess dirt and oils to slough away.