Allergy test

Allergy test

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.

Frequently Asked Questions about Allergy Testing

Why is an allergy test performed for symptoms around the anus?

Itching or irritation in the anal area can sometimes be caused by a contact allergy, for example to ingredients in creams, ointments, moist wipes, or occasionally certain foods. A patch test helps determine whether your skin reacts sensitively to one or more specific allergens.

What happens during a patch test?

During the first appointment, one or more sets of test patches containing different allergens are applied to your back. These patches remain in place for 48 hours and must stay dry and firmly attached during that time.

Do I need to avoid anything during the test period?

Yes. The patches must not get wet, and you should avoid strenuous exercise or activities that cause excessive sweating, as moisture and friction can interfere with the results. Avoid scratching the test area and do not apply creams or lotions to your back.

When are the test patches removed?

The patches are removed after two days. Depending on the instruction from your doctor, you may remove them yourself or return to the clinic. Some reactions may already be visible at that point, but they typically continue to develop over the next 24–48 hours.

How is the test result assessed?

One day after the patches are removed, your doctor will examine the test area carefully. An allergic reaction usually shows as redness, swelling, and small blisters. Mild redness alone does not necessarily indicate an allergy; the doctor evaluates both the pattern and severity of the reaction.

Does a patch test hurt, and are there side effects?

Applying the patches is not painful. If you are allergic to a substance, you may experience temporary itching, redness, or a mild burning sensation at that spot. These symptoms usually fade on their own within a few days.