If you mean pelvic effusion, pelvic effusion is pathological except for a small amount of physiological effusion before and after ovulation (a small amount of effusion before and after ovulation is normal), so you can go to the hospital to check whether it is physiological or pathological. Pathological hydrops is mainly caused by pelvic inflammation (refers to inflammation of pelvic organs such as endometritis, salpingitis and ovarian cyst).