Cellulitis is a bacterial infection of the deeper layers of the skin, the dermis and the subcutaneous tissue.

Erysipelas is a bacterial infection that occurs in the top layers of the skin. It’s also called St. Anthony’s Fire because it burns and is very painful. In erysipelas, the skin is usually very red and swollen and there is a well-defined border between normal and infected skin.

Folliculitis is another very common bacterial skin infection. Folliculitis is an infection in the hair follicle, which is a pretty small structure. It makes sense that this infection looks like a group of small little red bumps that can be filled with a small amount of pus.

Hot tub folliculitis
Hot tub folliculitis is an infection of the hair follicles caused by the bacteria Pseudomonas aeruginosa. This bacteria is commonly found in contaminated whirlpools, hot tubs, water slides, physiotherapy pools, or even loofah sponges.

A furuncle is an infection of the whole pilosebaceous unit. If not treated in the early stages, a furuncle can become an abscess and might have to be drained.

Carbuncle is a collection of multiple infected hair follicles.

Impetigo is a bacterial infection of the top layer of the skin, the epidermis.

Erythrasma is a bacterial skin infection that occurs in areas where skin touches skin, like between toes, in armpits, or groin. Because of its location and color, erythrasma is often confused with fungal infections.

Hidradenitis suppurativa
Hidradenitis suppurativa is a bacterial infection of certain sweat glands that are found in the armpits, groin, buttocks, scalp, and under the female breast.