Generally speaking, itching in the anus after taking a bath may be caused by shower gel not rinsed clean, water not wiped clean, pathological factors and other reasons. 1. Shower gel is not rinsed clean: shower gel contains many ingredients, and the anus skin is more sensitive, fragile, if the shower gel is not rinsed clean after a bath, in the anus has been there, it will always stimulate the anus skin, will produce anal discomfort, such as itching, etc., in serious cases, will be scratched resulting in tissue damage, inflammatory reaction. 2. Water is not dried: If the water in the anus is not wiped clean after taking a bath, it will lead to moisture in the anus, which in turn will cause itching and other symptoms. 3. Pathological factors: some anal canal diseases, such as anal fissure or hemorrhoids, etc., will also appear after the bath anal itching. It is recommended to consult a doctor as soon as possible. If the symptoms are serious, you can go to a regular hospital to clarify the specific causes and follow the doctor’s advice to deal with.