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.
Clogged pores. Sebum makes the skin greasy and encourages dead skin cells to block pores causing white or black heads. The bacterium Propionibacterium acnes normally lives on the skin and can cause irritation and redness around a blocked pore.If the bacterium gets into the pore then a spot will form.cne is not a product of bad diet or bad hygene. It is directly related to the amount of sebum (oil) produced in the skin. Sebum is regulated by testosterone. Tesosterone levels increase in both male and female during puberty and is a major factor in teen and early adult acne.