Big red pimples itch on the body. What's going on?

Skin shows large erythema, papules, accompanied by obvious itching symptoms, first considered allergic diseases, more common in urticaria, papular urticaria, eczema, erythema multiforme, etc. Conventional treatment, generally preferred antihistamines, such as ketotifen, levocetirizine, desloratadine, fexofenadine, etc.; can also take glucocorticoids to quickly control symptoms, such as prednisone oral or intramuscular dexamethasone; At the same time, external use has anti-allergic, antipruritic drugs, such as calamine lotion, soothing antipruritic tincture, glucocorticoid ointment (such as desonide cream, aloson ointment, halometasone ointment, etc.). To actively seek and prevent allergens, to prevent severe scratching, not to wash with soap and hot water, wear cotton clothes, reduce skin irritation.