Hot tub folliculitis

Definition:

Folliculitis is a superficial infection of the hair follicle. Hot tub folliculitis is a folliculitis that develops after exposure in a hot tub.

Causes, incidence, and risk factors:

Most folliculitis is caused by the common organism Staphylococcus aureus. Hot tub folliculitis is different in that it is caused by Pseudomonas aeruginosa. Pseudomonas survives in hot tubs, especially the wood type, unless the pH and chlorine content are strictly controlled.

Hot tub folliculitis becomes noticeable within half a day to two days after exposure. It first appears as itchy (pruritic) bumps -- some pus filled -- and may develop into dark red tender nodules. The rash may be denser under swimsuit areas where the material has held the contaminated water in contact with the skin for a longer period of time.