The treatment of rotten fingers requires finding its causative agent, including the following: i. Ringworm caused by fungal infection requires local wet application of compound cypress ringworm dispelling application and application of fusidic acid ointment for dampness, detoxification and anti-inflammatory treatment. If the erosion is dry and crusty, apply terbinafine hydrochloride gel or naftifine ketoconazole ointment in combination with itraconazole capsules for antifungal treatment. Second, scabies, which can occur in the area between the fingers of both hands, is caused by scabies infection, and can be treated by local wet application of skin Kang lotion and local application of sulfur lotion or sulfur ointment after the erosion dries.