Hello,
To find out the offending allergen which may be causing this allergic reaction as confirmed on biopsy, it is better to get investigated. Diagnosis of
skin allergies includes
Skin ***** tests (pricking the
skin with a needle or pin containing a small amount of the allergen ('***** Testing' or 'Scratch Testing'), Patch tests (by applying a patch to the skin, where the patch contains the allergen.) and RAST.