First, let’s explain what pelvic fluid is: Because the pelvic cavity, especially the depression between the back of the uterus and the rectum, is the lowest part of the abdominal cavity in the body, when fluid is present, it will flow to this area, and a dark area of fluid will be seen during ultrasound examination, and the ultrasonographer will give a diagnosis of “pelvic fluid” after measurement, and at the same time there will be a value of fluid The ultrasonographer will measure and give a diagnosis of “pelvic fluid” along with a depth value. The fluid may be water, blood, or pus. Does pelvic fluid need to be treated? The first thing to determine is whether it is physiological or pathological. 1. Physiological pelvic fluid. The normal physiological condition of the peritoneal cavity is 100-200 ml of plasma peritoneal fluid, and the chance of finding peritoneal fluid in the rectal fossa of the uterus on ultrasonography is significantly higher in women than in men. Therefore, if no other problems are found, it should be normal to find only a small amount of peritoneal fluid on examination; in addition, some normal women will have a small amount of blood accumulate in the pelvic cavity during menstruation or ovulation, forming pelvic fluid, the fluid in such pelvic fluid is generally less and will be gradually absorbed, and generally no treatment is needed. 2.Pathological pelvic fluid. Some diseases can cause pelvic effusion: acute and chronic inflammation of the pelvis, tumor, tuberculosis, ectopic pregnancy, rupture of the corpus luteum, etc. The specific diagnosis requires a doctor to combine the patient’s symptoms, signs and other tests to make a comprehensive judgment. The advice I would like to give here is: if you see “pelvic fluid” in the ultrasound report, with a depth of about 1cm, without any uncomfortable symptoms and no obvious abnormalities in other tests, you can get away without treatment (if a doctor diagnoses pelvic inflammatory disease just because he sees a small amount of pelvic fluid, it can only be said that he is not professional enough); if it is accompanied by abdominal pain, fever If there are symptoms such as abdominal pain, fever, or other abnormal findings, the doctor will need to determine whether further examination and treatment are needed.