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 coating the surface of the skin slows down the evaporation of water also known as TEWL. the skin absorbs oxygen and discharges carbon dioxide. Absorption occurs through the cells, follicles and pores of the skin. The top outermost layer of the epidermis the esthetician is primarily concerned with this layer. This layer is very thin and is waterproof, permeable and regenerates itself. It is also referred to as the horny layer or cell because of the scale like cells