The itchy paste is considered to be a manifestation of allergy, caused by intolerance of the skin to the paste. Clinically, it is also called contact dermatitis. In mild cases, it is only itchy, but in severe cases, erythema, papules, even blisters and blisters can appear, and some patients can form vesicles and ooze. Oral anti-allergy medications, such as loratadine or cetirizine hydrochloride, are required, and in severe cases, oral anti-inflammatory agents can be combined with compound glycopyrrolate tablets. Topical hormonal creams such as Denide cream and Mometasone furoate cream can be applied topically. If the surface has obvious vesicles exuding, you can use 3% boric acid solution wet compress, twice a day, 3-5 days after the vesicles dry and then topical application of hormonal creams. After the paste allergy to avoid re-use, to prevent repeated.