The preferred treatment for retroperitoneal abscess, which is usually a confined abscess that forms behind the peritoneum due to multiple causes, is surgical drainage and appropriate antibiotic anti-inflammatory therapy, and transabdominal drainage should be avoided as much as possible. Surgery for drainage of retroperitoneal abscesses sometimes requires additional surgery, such as nephrectomy, intestinal resection, including intestinal fistula, depending on the primary pathology. In addition, patients should be given nutrition and supportive treatment during treatment to improve their nutritional status, which will help improve tissue healing ability and immunity of the body, promote the control and limitation of infection, and accelerate tissue repair. The above is for reference only, the specific medication and treatment should be guided by the doctor’s interview.