Small abdominal swelling and discomfort after sexual intercourse should first exclude pregnancy, the discomfort may be related to heavy movements, but also may be related to pelvic abnormalities, such as local endometriosis nodules, localized restricted masses, other causes such as gynecological inflammation. You need to go to the gynecologist for a systematic examination, which includes gynecological ultrasound to find out the condition of the uterine adnexa and the pelvis, cervical examination to rule out cervical pathology, secretion examination to see if there is any vaginal inflammation, vaginal examination to find out if there are any localized palpable nodules and masses, and based on the results of the examination to find out the cause and to give the symptomatic treatment. If there is no abnormality in the examination, you need to pay attention to hygiene, clean the vulva with water every day, loose underwear, cotton, breathable, avoid eating cold, spicy and stimulating food, pay attention to cleaning the vulva before and after coitus, and the action should not be too heavy, rough, most of them can be relieved.