The common causes of gynecological bleeding are pregnancy-related diseases and cervical lesions, etc. If you saw red yesterday morning and have a blood clot tonight, you should go to the hospital for a gynecological examination, ultrasound, etc., and then treat accordingly based on the results of the examination. 1. Pregnancy-related illnesses: If a woman has confirmed pregnancy, consider that it may be caused by preeclampsia, should go to the hospital to do ultrasound and other tests, and in the early stages of pregnancy to give progesterone oral treatment, mid-pregnancy, late pregnancy to give magnesium sulphate drip and other treatments, such as the pregnancy has been full-term, there are vaginal redness and other discomforts, consider that it is the preeclampsia of the birth of a baby, you should go to the hospital to wait for the birth of a baby. 2. Cervical lesions: If pregnancy has been ruled out, in addition to gynecological ultrasound, gynecological examination, colposcopy should be done to pay attention to the cervix with or without polyps, pre-cancerous lesions, etc., and take lesions to do pathological examination if necessary. Abnormal gynecological bleeding can also be seen in other causes, such as lesions of the lining of the endometrium, endocrine disorders and other diseases, it is recommended to consult a doctor in time to clarify the cause of the disease. During the treatment of vaginal bleeding, women should pay attention to rest, do not do strenuous activities, pay attention to personal hygiene, prohibit sexual intercourse.