I believe that many women are familiar with pelvic inflammatory disease, and of course pelvic effusion is no stranger to the body examination ultrasound report will be written on pelvic effusion. Many women may mistake pelvic inflammatory disease and pelvic effusion for the same disease. In fact, pelvic effusion is not the same as pelvic inflammatory disease, so there is no need to worry too much about it, but not all pelvic effusions are without problems either. Usually, we classify pelvic effusion into physiological pelvic effusion and pathological pelvic effusion, which need to be clearly distinguished. Physiological pelvic fluid Under normal physiological conditions, there is a small amount of fluid in the pelvic cavity, which mainly serves to lubricate the surface of organs, reduce friction between organs, and also has a certain defense function. During ovulation, follicular fluid will flow into the pelvic cavity after follicle rupture, and ultrasound examination will indicate a small amount of pelvic fluid at this time. In addition, a small amount of menstrual blood occasionally flows back into the abdominal cavity during menstruation, which can also lead to a small amount of pelvic fluid. These pelvic effusions are normal physiological phenomena and need not be overly worried. Pathological pelvic effusion is due to the presence of inflammatory exudate in the pelvic cavity, which mostly occurs after pelvic inflammatory diseases. Pelvic inflammatory disease (referred to as pelvic inflammatory disease) is an inflammation of the female reproductive tract and its surrounding tissues, mainly including endometritis, tubal inflammation, tubo-ovarian abscess, pelvic peritonitis, etc. It can be found in many parts of the female genitalia and can originate from abortion, uterine surgery, unclean sex, multiple deliveries and infection during surgery, etc. The main symptoms include: a feeling of falling, pain in the lower abdomen and lumbosacral area, decreased resistance; menstrual disorders; infertility, etc. Although pelvic effusion is not necessarily pelvic inflammatory disease, pelvic inflammatory disease can induce pelvic effusion, and on the contrary, pelvic effusion is one of the factors that cause pelvic inflammatory disease. If the ultrasound suggests a large amount of fluid, a large range, and accompanied by unilateral or bilateral abdominal pain, lumbosacral pain, lumbago, swelling and pain, you need to be alert to the presence of pelvic inflammatory disease, should promptly go to the hospital to avoid delaying the disease, resulting in the rapid spread of germs, leading to complications such as tubal inflammation and tubal blockage, and even infertility or chronic pelvic pain, etc. The most important thing is to prevent pelvic inflammatory disease. In daily life, strengthening exercise, maintaining a healthy state of mind, eating less cold, spicy and other stimulating foods, paying attention to personal hygiene, washing and changing underwear, and avoiding sexual intercourse during menstruation can keep women away from pelvic inflammatory disease.