Pelvic fluid is divided into physiological and pathological two kinds: First, physiological and hormone level fluctuations related to, usually in the ovulation period or early pregnancy, do not need special treatment, can be self-absorbed; Second, pathological mostly caused by gynecological inflammation, the common causes are: 1, menstrual period of unhygienic, sexual intercourse during menstruation, the use of unclean menstrual pads, etc., so that the pathogens invade and caused by inflammation; 2, caused by sexual activity; 3, vaginitis, Cervicitis when inflammation upstream infection; 4, uterine cavity surgical operation infection, such as curettage, hysteroscopy, etc.; 5, the direct spread of neighboring organs, such as appendicitis, peritonitis, etc. spread to the pelvis. There are also a few cases caused by ruptured ectopic pregnancy, endometriosis, pelvic tumor, ovarian cancer. Pelvic effusion will appear when the lumbar pain and abdominal pain, abnormal leukorrhea and other symptoms, there is inflammation needs timely anti-inflammatory treatment, usually should pay attention to rest, avoid spicy and stimulating food, keep the external genital clean and dry, pay attention to sexual hygiene, avoid causing inflammation leading to upward infection; drink more water, appropriate exercise, improve the body’s resistance. For ectopic pregnancy, endometriosis, tumors and other causes of pelvic effusion need timely surgical treatment.