Bruising with hard lumps after a spanking injection in the buttocks has been going on for more than 10 days and can be treated by general therapy, physical therapy, surgery, etc. Bruises and hard lumps after buttock injection are generally due to poor absorption of injected drugs, pushing drugs too fast and other reasons. 1. General treatment: after the injection in the buttocks bruises with hard lumps for more than ten days, you can use a warm towel every day to apply hot compresses to the injection site, which can accelerate blood circulation and promote the dissipation of hard lumps; you can also use potato slices to apply on the affected area, which can play a role in reducing the swelling, thus promoting the dissipation of hard lumps. 2. Physical therapy: in the buttocks after injection bruises with hard lumps for more than ten days, can be applied to infrared radiation, through the local to hand can achieve therapeutic effect. 3. Surgical treatment: in the buttocks after injection bruising with hard lumps for more than ten days, there is the formation of local epidermoid cysts and other possibilities, if the conservative treatment is ineffective, can be carried out by a professional surgeon under local anesthesia for the removal of hard lumps to achieve the therapeutic purpose. In the buttocks after injection bruises with hard lumps for more than ten days, please go to the hospital in a timely manner, by the physician according to the patient’s condition for treatment, they can not just randomly use drugs, so as not to delay the condition.