Itchy around the anus can be caused by an allergy. Examples of this are allergies to hemorrhoid creams or to preservatives or perfume in so-called wet wipes. There may also be an allergy to foods, such as herbs. This can be tested with a patch test. You will receive three appointments for this research. At the first appointment, the patches (stickers) are applied on the back. Depending on your symptoms, extra stickers may sometimes be applied. The test patch can be removed two days after application. Your doctor may ask you to do that yourself, or have them come back for this. If your skin has responded to one or more allergens, this reaction will develop further in the next 24-48 hours. One day after removing the test patches, your doctor will carefully examine the test area for signs of an allergic reaction. This reaction usually consists of a red rash with swelling and small blisters. A red discolouration alone does not mean that you have an allergic reaction.
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