Infections caused by yeast, herpes, genital warts, pinworms, scabies, and lice cause the condition. Skin conditions such as contact dermatitis
, psoriasis, and seborrheic dermatitis
may initially present as pruritis ani. Contact dermatitis may be caused by exposure to soaps, contraceptive jellies and foams, scented toilet paper, deodorant sprays, and douches. Individuals who have chronic diarrhea may have pruritis ani because of the difficulty keeping the area clean and dry.