If this happens once in a while, especially near the day of ovulation, it may be caused by ovulation pulling on the ligaments in the adnexal area and can be observed without special treatment. However, if the swelling and pain is persistent or vague, and also during non-menstrual periods, it may be caused by chronic pelvic inflammatory disease or adenomyosis, and you need to come to the hospital for gynecological examination and ultrasound. If pelvic inflammatory disease is identified, it is generally recommended to treat with Chinese herbal enemas, combined with oral Chinese medicine, and the treatment course may be relatively long, requiring 2-3 cycles of 10-15 days per cycle.