There is blood in the panties, but not menstruation, need to be determined according to the specific circumstances: 1, if in the middle of two menstruation, that is, ovulation appears blood in the panties, suggesting that ovulation bleeding is more likely, ovulation in the body estrogen levels a transient reduction, there will be a small amount of vaginal bleeding during ovulation 2-3 days, appear occasionally 1-2 times the problem is small. However, if ovulatory bleeding occurs frequently, it indicates endocrine disorder, so you must go to the hospital for relevant examination and treat it according to the examination results. 2. Irregular bleeding during the luteal phase, with bleeding time about 1 week before menstruation, indicates insufficient luteal function, and the application of progesterone and dextrinone for symptomatic treatment can be restored to normal after conditioning. 3. The cervical lesions, generally bleeding after intercourse, must go to the hospital to do cervical-related examination, according to the results of the symptomatic treatment. 4, need to exclude bleeding hemorrhoids.