Hip grew a meatball painless and itchy may be dermatofibroma, sebaceous cysts, lipoma, etc., according to the cause of the need to take targeted treatment. 1. Dermatofibroma: also known as soft fibroma, caused by focal proliferation of fibroblasts or histiocytes, which can occur naturally or after trauma, and solitary lesions can be seen on the buttocks, which can be painless and itchy. Usually no treatment is needed, or they can be removed by laser or surgical excision. 2. Sebaceous cysts: Obstruction of the excretory ducts of the sebaceous glands of the skin can form localized retention cysts, resulting in a painless and itchy growth of a meatball on the buttocks. Vitamin A cream can be applied to dissolve the secretion in the pores, or cyst excision surgery can be done to treat it. 3. Lipoma: the occurrence of lipoma is related to heredity and fat metabolism abnormality, generally belongs to benign tumors, which can also lead to the appearance of painless lumps on the buttocks, forming the symptom of growing a meatball on the buttocks without pain or itching. Generally there is no need for special treatment, and resection can be done if necessary. There may be other reasons for the painless and itchy buttocks, so it is recommended that the patient go to the hospital to clarify the cause and follow the doctor’s instructions for treatment.