Chronic pelvic inflammatory disease refers to chronic inflammation of the female internal reproductive organs and the surrounding connective tissues and pelvic peritoneum. It is often caused by incomplete treatment of acute pelvic inflammatory disease. In patients with poor physical conditions, the course of acute pelvic inflammatory disease can be prolonged and recurrent, resulting in chronic pelvic inflammatory disease; however, there may be no history of acute pelvic inflammatory disease, such as salpingitis caused by Chlamydia trachomatis infection. Chronic pelvic inflammatory disease is a more stubborn condition and can lead to menstrual disorders, increased leucorrhea, waist and abdominal pain, and infertility. If chronic adnexitis has formed, a mass can be felt.