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Rashes, Localized & Cause Unknown

Avoid the Cause: Try to find the cause. Consider irritants like a plant (e.g., poison ivy or evergreens), chemicals (e.g., solvents or insecticides), fiberglass, a new cosmetic, or new jewelry (called contact dermatitis). A pet may be carrying the irritating substance (e.g., with poison ivy or poison oak).
Avoid Soap: Wash the area once thoroughly with soap to remove any remaining irritants. Thereafter avoid soaps to this area. Cleanse the area when needed with warm water.
Local Cold: Apply or soak in cold water for 20 minutes every 3 to 4 hours to reduce itching or pain.
Steroid Cream: If the itch is more than mild, apply 1% hydrocortisone cream (no prescription needed) every 2 hours until it feels better, then 4 times per day.
- CAUTION: Do not use a steroid cream on suspected Athlete's Foot, Jock Itch, or ringworm.
Avoid Scratching: Try not to scratch. Cut your fingernails short.
Contagiousness: Adults with localized rashes do not need to miss any work or school.
Expected Course: Most of these rashes pass in 2 to 3 days.
IF your symptoms become worse: Review Should I Call? recommendations.