Pelvic fluid 22cm may have serious intrauterine infection, pelvic inflammatory disease, ovarian hyperstimulation syndrome, ovarian cancer, pelvic tuberculosis and other problems. Digestive system diseases, such as liver tumors, gastrointestinal tumors, etc., are more serious and need to be clarified as soon as possible to determine the cause and treated accordingly. Normal pelvic cavity can have a small amount of fluid. Pelvic fluid is originally just a normal physiological manifestation formed by the accumulation of fluid in the abdominal cavity. A small amount of pelvic fluid can disappear on its own, and most pelvic fluid of 1-3 cm does not require treatment. When pelvic fluid reaches 22cm, it means it is caused by pathological reasons, which may be caused by chronic pelvic inflammation or pelvic tumor, ruptured bleeding from ectopic pregnancy, ruptured bleeding from corpus luteum, twisted or ruptured ovarian cyst, ovarian hyperstimulation syndrome, pelvic inflammatory disease, ovarian cancer, pelvic tuberculosis and other problems. In this case, further examination in gynecology is needed to find the cause and determine whether anti-inflammatory treatment or surgical treatment is needed. Patients should pay attention to rest, eat a light diet and eat more protein-rich foods to help strengthen the body.