The hard nodules on the buttocks do not disappear, first of all, determine whether there is the problem of folliculitis or sebaceous cysts, sebaceous cysts, if necessary, surgery for treatment. 1. Inflammation of hair follicles: Inflammation of hair follicles is often associated with Staphylococcus aureus or Streptococcus epidermidis infections, which can form nodules after healing, and it is recommended that erythromycin ointment or ichthyosporin ointment can be used externally to carry out the treatment, and to keep the local area clean. 2. Sebaceous cysts: Sebaceous cysts are benign tumors that can occur in any part of the skin, manifested as well-defined nodules, asymptomatic and generally do not require special treatment, and if the infection occurs, surgical excision can be performed after infection control. In case of infection, surgical removal can be done after infection control. For the problem of hard nodules on the buttocks, it is recommended to consult the general surgery department of regular hospitals for diagnosis.