Moldwin RM, Valderrama E. Antifungal creams can treat balanitis caused by Candida. Many types of eczema can affect the skin on the penis, including:. If the inflammation appears to be due to an allergic reaction or irritant, the doctor may prescribe a mild steroid cream, such as one percent Foreskin after sex, for the swelling. Questions and Answers on Genesis. Your doctor may prescribe a Foreskin after sex topical corticosteroid.