History of exposure to swimming pools, salt water aquarium or ocean fish
Single or multiple red to reddish-purple bumps
Occur frequently on the hands, elbows, knees, legs, and areas of trauma
May be present for months
Signs and tests:
Though swimming pool granulomas have a characteristic appearance, a skin biopsy and culture is usually necessary to confirm the diagnosis. A PPD tuberculin skin test will usually be positive as well.
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