Identify and avoid the trigger
Wash the area gently with mild soap and lukewarm water
Keep the skin clean and dry
Apply a cool compress
Use a fragrance-free moisturizer
Apply over-the-counter hydrocortisone cream if appropriate
Take an oral antihistamine for itching if needed
Avoid scratching or rubbing the rash
Wear loose, breathable clothing
Use calamine lotion for itching
Stop using any new skin products that may be causing irritation
Seek medical care if the rash spreads, worsens, or does not improve
Seek urgent care if there is trouble breathing, facial swelling, fever, blistering, or signs of infection