Pelvic fluid depends on the amount of fluid. Generally, a small amount of pelvic fluid less than 20mm does not require special treatment, and sometimes it can be absorbed by itself as the body’s resistance rises. Sometimes a small amount of pelvic fluid can occur during ovulation or menstruation, which is physiologic and does not necessarily require treatment. If the amount of pelvic fluid is greater than 20mm, accompanied by other back pain, lumbosacral pain, and a feeling of falling in the abdomen, it is considered that there may be pelvic inflammatory disease. If the amount of fluid is not very large, it first needs to be treated by infusion of anti-inflammatory treatment. Because pelvic fluid extraction is damaging, and after discharge from the hospital does not rule out the possibility of recurrence, and sometimes may be more than without fluid extraction. If conservative treatment is ineffective and the amount of fluid increases dramatically, you can take fluid extraction, and after fluid extraction, you need to continue anti-inflammatory treatment with antibiotics, otherwise there is still a possibility of recurrence. Generally, it takes at least 7-10 days of anti-inflammatory treatment after fluid aspiration, and at the same time, the diet should be light.