Identify and avoid the trigger if known
Wash the area gently with mild soap and lukewarm water
Pat the skin dry; do not rub
Apply a cool compress for 10–15 minutes
Use fragrance-free moisturizer on dry skin
Apply over-the-counter hydrocortisone cream as directed
Use calamine lotion for itching
Take an oral antihistamine if appropriate
Wear loose, breathable clothing
Avoid scratching
Keep nails short
Use colloidal oatmeal baths
Stop using new skin products that may irritate the rash
Seek medical care if the rash spreads, worsens, or does not improve
Seek urgent care if there is trouble breathing, facial swelling, fever, pus, or severe pain