Pelvic inflammatory disease is an infectious disease of the upper genital tract in women, mainly occurring in sexually active and menstruating women. It mainly includes endometritis, tubal inflammation, pelvic floor peritoneal connective tissue inflammation, and tubo-ovarian abscess. The clinical manifestations are either asymptomatic or mild. Typical clinical manifestations are lower abdominal pain, lumbar pain and increased discharge, and in severe cases, fever or even high fever, chills, nausea, vomiting and loss of appetite. If it affects the urinary system there will be frequent urination and lumbar pain, and if it affects the digestive system, there will be nausea and vomiting. If an abscess forms, pelvic masses will be felt as well as there will be local irritation symptoms, such as if the mass is near the bladder, there will be urinary symptoms, and if it is near the rectum, there will be lower abdominal cramps and the feeling of always wanting to defecate, which are the clinical manifestations of acute pelvic inflammatory disease. If it is chronic pelvic inflammatory disease, it is mainly chronic pelvic pain, in addition to infertility, ectopic pregnancy and recurrent episodes of pelvic inflammatory disease. In conclusion, the typical clinical manifestations of pelvic inflammatory disease are lower abdominal pain, lumbago and increased vaginal discharge, which must be taken seriously clinically. If treatment is not timely, it will become chronic, and if it becomes chronic, pelvic pain, infertility, ectopic pregnancy and recurrent episodes will occur, and treatment will be very tricky.