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Hot tub folliculitis

Hot tub folliculitis is an infection of the skin around the lower part of the hair shaft (hair follicles). It occurs when you come into contact with certain bacteria that live in warm and wet areas.


Hot tub folliculitis is caused by bacteria that survives in hot tubs, especially tubs made of wood.


The first symptom of hot tub folliculitis is an itchy, bumpy, and red rash. Symptoms can appear from several hours to 2 days after contact with the bacteria.

The rash may:

  • Turn into dark red tender nodules
  • Have bumps that fill with pus
  • Look like acne
  • Be thicker under swimsuit areas where the water was in contact with the skin for longer

Other people who used the hot tub may have the same rash.

Exams and Tests

Your health care provider can often make this diagnosis based on looking at the rash and knowing that you have been in a hot tub. Testing is usually not needed.


Treatment may not be needed. The mild form of the disease often clears on its own. Anti-itch medicines may be used to ease discomfort.

In severe cases, your health care provider may prescribe an antibiotic.

Outlook (Prognosis)

This condition usually clears without scarring. The problem may come back if you use the hot tub again before it has been cleaned.

Possible Complications

Discomfort and abscess formation can rarely occur.

When to Contact a Medical Professional

Call your health care provider if you develop symptoms of hot tub folliculitis.


Controlling the acid levels and chlorine content of the hot tub may help prevent the problem.


James WD, Berger TG, Elston DM, eds. Andrews' Diseases of the Skin: Clinical Dermatology. 11th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 14.

Pasternack MS, Swartz MN. Cellulitis, necrotizing fasciitis, and subcutaneous tissue infections. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, PA: Elsevier Churchill Livingstone; 2009:chap 90.

Update Date 11/20/2014

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