How do I develop a contact allergy?

Contact allergies arise from repeatedly having skin contact with a substance that can cause allergies (not all substances can). Allergy-causing substances are also called allergens. They can include, for example, fragrances, preservatives or UV filters in sun screens.

How many times your skin will be exposed to an allergen before you develop allergies depends on the individual. But it requires at least two times before getting a reaction on your skin.

The reaction does not come immediately - it can happen after a few hours or up to two days after contact. As a result, it can be a challenge to find out what it is that creates a reaction. So if you experience recurring problems with a skin rash, it’s a good idea to go to the doctor to get it properly diagnosed and treated.