skin allergy test preparation by doctor on a patient hand using pen to mark the allergen zone

allergen allergenic allergic allergisation allergization allergy analysis animal arm asthmatic check clinical cuticle doctor drop epidermis erythema erythrodermia evidence experiment fever fleam hair hand hay healthcare hypersensitive hypersensitivity laboratory lancet liquid mark medical medicine patient pen pipette pollen practice preparation pricktest procedure reaction reddened redness sensitization sensitizing skin surgery test using zone