Tests for skin allergies 1. Generalized or localized rash, which may be accompanied by redness, dry flakes, blisters, or crusting and oozing liquefaction of lesions; these lesions vary in shape and size. Other symptoms of skin allergy include skin symptoms including itching, sneezing, runny nose, teary eyes, rashes, airway obstruction, or such as hives. 2, on the allergic reaction caused by contact dermatitis check the special case to check the box limit of the main; 2. primary irritant-induced cases, lesions with a wide range of systemic symptoms, check the special case may include check the box limit of. 3. Allergen examination.