Hot tub folliculitis is triggered by the bacteriaPseudomonas aeruginosa,which infects the hair follicles.
The bacteria is commonly found in recreational water and natural sources of water, such as lakes and rivers.
It is also frequently caused byStaphylococcus aureusand the fungusAspergillus Nigus.

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This article covers the symptoms and causes of hot tub folliculitis.
It also discusses how it is diagnosed, treatment options, and prevention tips.
Hot Tub Rash Symptoms
A hot tub folliculitis rash is itchy, bumpy, and red.
While it looks likeacne, the rash will come on faster than pimples do.
As the rash gets worse, the bumps get biggerup to 3 centimeters in diameter.
The bumps can also be filled with fluid (pus) and can form around hair follicles.
Some bumps may stay as small papules or superficial small pustules.
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What Causes Hot Tub Rash?
This is the same microbe that causes swimmers ear (otitis externa).
The longer you soak in water tainted withPseudomonas,the greater your chances of getting hot tub folliculitis.
Hot tub folliculitis is not contagious and will not spread through skin-to-skin contact.
It is unlikely that there would be enough bacteria on a person’s skin to contaminate someone else.
However, there are other potential sources including:
Who Is at Risk?
Additional testing usually is not needed.
This can be done by taking a sample of fluid from the blisters or a small skin biopsy.
These tests can be ordered if there is any doubt as to what is causing the rash.
Treatment, if needed, can include home or over-the-counter (OTC) remedies, or prescription medications.
However, hot tub rash often clears up on its own within 10 days.
Until then, several home remedies may help relieve symptoms and speed up healing.
For widespread, resistant cases of hot tub rash, the oralantibioticCipro (ciprofloxacin) can be prescribed.
They should fade over time, but it can take up to 18 months.
you’re able to ask your healthcare provider about treatments that can help fade discolored areas more quickly.
You also should not pop folliculitis bumps.
Doing so can lead to infections or cause damage to your skin.
Its also helpful to clean off after spending time in the water.
American Osteopathic College of Dermatology (AOCD).Hot tub folliculitis.
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MedlinePlus.Hot Tub Folliculitis.
U.S. National Library of Medicine.