Wear loose-fitting clothes and underwear, like boxers or boy shorts. Tight clothes rub on sensitive skin and can make symptoms flare. Choose natural fabrics. Clothes made from cotton or silk are kinder to your skin than synthetics. Change your clothes right after exercise so sweat doesn't stay close to your skin and irritate it. Although it may sound like a good idea, workout gear made of "moisture-wicking" fabrics might stick to affected skin.