A patch test is an examination method that allows you to determine the sensitivity of the skin to a certain substance. It is carried out by applying a small amount of the test substance to the skin and observing the skin's reaction over a certain period of time. The purpose of this test is to determine the presence of an allergic reaction to a given substance.
The application test is carried out as follows: a small amount of the test substance is applied to the skin in the form of a drop or strip. Typically, water-soluble substances such as dyes or allergenic substances are used. The skin is then observed for a certain period of time, usually from a few minutes to several hours. If there is redness, swelling or other changes in the skin, this indicates the presence of an allergic reaction.
The substances used can vary, but the most common are allergens, such as various dyes and reagents. Also applicable