If there is a small amount of vaginal bleeding and stomach pain after sex, it is usually considered that there are gynecological inflammation, such as pelvic inflammatory disease, cervical polyps, cervical erosion, cervical malignant lesions and so on, which may lead to such a situation. Among them, cervical malignant lesions are the most important to pay attention to, because under normal circumstances the cervix will not appear contact bleeding. It is necessary to go to the hospital in time to improve the relevant examinations, such as ultrasound of the pelvis, cancer screening of the cervix, etc. If the bleeding is caused by inflammation, it can be relieved by symptomatic treatment. If the bleeding is caused by malignant lesions of the cervix, it needs to be treated carefully and, if necessary, surgically.