Tubal obstruction is an important cause of female infertility, and the cause of its pathology is mainly inflammation. Its formation can be caused by incomplete or untimely treatment of acute tubal infection, resulting in adhesion of tubal mucosa, such as incomplete abortion, inflammation caused by residual placenta, individual with intrauterine device, secondary to chronic tubal inflammation, long-term inflammatory stimulation makes the tubal thicken, harden, lumen adhesion, narrowing, and even adhesion with surrounding tissues, thus affecting tubal egg collection function and ability to transport sperm and eggs. Most of the patients with tubal obstruction have chronic pelvic inflammatory disease, such as pain on one or both sides of the abdomen, falling, excessive discharge and back pain. Hydrosalpinx is a more common type of chronic tubal inflammation. After tubal inflammation, either due to adhesions and atresia, the secretion of mucosal cells accumulates in the lumen, or due to adhesions at the isthmus and umbilical end of the tubal inflammation, the obstruction forms tubal pus, and when the pus cells in the lumen are absorbed, it eventually becomes a watery liquid, or some liquid is absorbed leaving an empty shell, which shows hydrosalpinx shadow during imaging.