A small hard lump and pain after recovery from inguinitis is most likely due to the formation of a periungual abscess or localized epidermal overgrowth. 1. Peripheral abscess: inguinitis is a suppurative inflammatory disease that occurs in the nail groove or soft tissues around the nail. Most of them are caused by narrow and deep puncture wounds or nails cut too deeply. After the healing of inguinitis, there are small hard lumps around and painful when pressed, indicating that the inguinitis is not fully recovered, and may develop into a semi-circular abscess, with the progression of the disease will occur locally in the degeneration, necrosis, and the formation of hard knots. At this time should go to the hospital incision, drainage. 2. Local epidermal hyperplasia: common in conservative treatment patients, due to the progress of inflammation leads to local tissue epidermal hyperplasia, resulting in the emergence of thickening of the stratum corneum, there will be the phenomenon of inguinitis is well, but there is a small hard lump. The treatment of inguinitis should be timely to the hospital, under the guidance of the doctor standardized treatment.