Bright red blood from intercourse just after the period, if it is occasional, it may be caused by improper sexual life and can be no cause for concern. If the bleeding is frequent after intercourse, or continues to bleed more than once, it is considered a reproductive system disease, due to cervical lesions, endometrial lesions, resulting in brittle mucous membrane and easy bleeding. It is recommended to seek medical examination to determine the cause of bleeding and treat accordingly: 1. Inappropriate sexual life: because the period just finished, the uterus has not fully recovered, more fragile, improper sexual life, the uterus caused stimulation, thus leading to bleeding again, no need to worry too much. Wash the vulva and vaginal opening in time after intercourse, no need to wash the vagina, and also pay attention to observe the bleeding situation; 2. Cervical lesions: including cervicitis, cervical polyps, cervical cancer and so on. For cervicitis is mainly treated with antibiotics. In case of cervical polyp and cervical cancer, surgical treatment is needed, and cervical cancer may also need to be treated with radiotherapy; 3. Endometrial lesions: such as endometrial polyps and endometrial cancer, stimulation of the cervix during intercourse leads to contraction of the uterus, and vaginal bleeding may occur. For patients with endometrial polyps with no obvious symptoms and small polyp size, no treatment is usually needed, regular follow-up is sufficient, and some patients can improve their symptoms with progesterone. For those with severe symptoms, large polyps or risk of malignant transformation, surgery can be performed. For endometrial cancer, the main treatment is surgery, supplemented by radiotherapy.