When the sweat ducts become clogged or plugged by prolonged exposure to perspiration, they break open, allowing sweat to escape just below the skin which causes the rash. Everyone is familiar with the rash caused by poison oak , poison ivy, or poison sumac. A small, painless swelling or an intense itching rash may form at the site of the bite of an insect, such as a mosquito or horsefly. The first step in treating an itchy rash is not to scratch. Scratching can lead to an infection which might need antibiotics to clear.
Most rashes go away without treatment.
If you develop a fever, or your itch is uncontrollable, call your physician. Sponsored Links Allergy Management Resources Learn about allergies and allergy treatment for adults and children. Sign up to receive an e-mail with your local pollen forecast. Free Shipping and competitive pricing. Save Now with a Free Pharmacy Discount Card.