Loose cotton underwear is a better choice than clinging nylon or polyester because it absorbs moisture better and allows more air to pass through, keeping your bottom dry, says Dr. Orkin. Sock it to pinworms. Pinworms generally infect young children, but other family members can attract the unwanted attention of these pests, which come out at night and cause infernal anal itching. Your doctor can prescribe an oral antiparasitic medication to relieve the problem, but you also should thoroughly wash all bedding in hot water to prevent a recurrence. Check your medications.
Some drugs can cause anal itching.
Antibiotics, for example, often destroy harmless bacteria in the anus that fight off itchy yeast infections. Ask your doctor if your medications may be causing your problem. Blow your itch away. Using a hair dryer set on low for 20 to 30 seconds after bathing or swimming is a good way to gently but thoroughly dry your bottom and prevent itching. Bare your bottom to the sun.