cause of hot tub folliculitis
âHot Tub Rashâ (Pseudomonas Dermatitis / Folliculitis) If contaminated water comes in contact with a personâs skin for a long period of time, it can cause a rash called hot tub rash, or dermatitis. Hot tub rash is often caused by infection with the germ Pseudomonas aeruginosa. This germ is common in the environment (for example, in the water and soil) and is microscopic, so it canât be seen with the naked eye.