A patch test is used to find allergic causes of eczema/dermatitis and some other types of skin reactions such as reactions to drugs.
You may advise a patch test:
- If you suspect an allergy as a cause of your eczema such as to cosmetic ingredients or hair dye
- If you have eczema that is proving difficult to treat to ensure you are not allergic to ingredients of the treatment for your eczema
- If you have a work related eczema/dermatitis