Itchy erythema on the hands to consider the following possibilities: 1, polymorphic erythema: mainly can appear edematous erythema, part of the erythema surface can be iridescent phenomenon, and is accompanied by itching such a situation. In clinical treatment, you can take oral levocetirizine hydrochloride capsule every night one capsule combined with compound glycyrrhizin capsule three times a day, two capsules a time, with the external use of mometasone furoate ointment once in the morning as well as flufenamic acid butyl ester ointment at noon and evening each time to carry out the treatment. 2, eczema: mainly due to allergies or sun exposure and other reasons. You can take oral loratadine capsule and apply Denard ointment for treatment.3. Tinea corporis: mainly ring-shaped erythema with slightly elevated edges accompanied by itching, and the results of the laboratory test for fungus is (+) you can apply luliconazole ointment for treatment.