The inguinal papular erythema can be seen in ringworm, eczema, prickly heat and other diseases, which can be improved by general treatment and topical medication. 1. Ringworm: mainly caused by red trichophyton, mossy trichophyton and other infections, preferably in the groin and femoral parts, the lesions are red papules, papules or small blisters at the beginning. Miconazole nitrate cream, terbinafine cream and other antifungal drugs can be used externally, when the symptoms are serious, you can also follow the doctor’s instructions oral itraconazole, terbinafine and other antifungal drug therapy. 2. Eczema: This disease is an inflammatory disease of the superficial dermis and epidermis caused by a variety of reasons. It often manifests itself as erythema, pinpoint to millet size papules, papules and so on. Eczema is often treated with topical glucocorticoid creams such as Dinaid cream and mometasone furoate cream, oral antihistamines such as loratadine and cetirizine, and physical therapy such as narrow-wave ultraviolet irradiation can also be applied. In severe cases, under the guidance of the doctor, the systematic application of glucocorticosteroids such as prednisone, cyclosporine, methotrexate and other immunosuppressive therapy. 3. Prickly heat: also known as prickly heat rash, common in summer or hot environment. There can be a dense arrangement of pinpoint-sized papules, papules, surrounded by what appears to be a reddish halo. Topical drugs can choose glycerite lotion, etc., to play the role of astringent, itching; itching obvious patients, but also under the guidance of the doctor oral loratadine, ebastine and other antihistamines to stop itching treatment. The inguinal papular erythema may also be caused by other diseases, it is recommended that patients go to the hospital in a timely manner, after a clear diagnosis under the guidance of the doctor to receive targeted treatment.