The tenth day of menstruation and then a little bit is likely to be endocrine disorders, gynecological diseases, intrauterine placement of birth control devices, drug factors. 1. Endocrine disorders: polycystic ovary syndrome, pituitary tumors and other factors, can lead to hormone level disorders in the female body, will affect the female menstruation, resulting in menstrual dribbling, in the 10th day there will still be drips of blood, there may be a menstrual cycle is too long, too short and other abnormalities. 2. Gynecological diseases, such as endometritis, uterine fibroids, cervical cancer, etc., after the aggravation of the lesions, can lead to non-menstrual vaginal bleeding, which may be accompanied by pain in the lower abdomen, increased secretion, odor of secretion and other symptoms. 3. Intrauterine birth control device: If a woman has a birth control device placed in the uterus, the improper position of the device may cause damage to the uterine lining, resulting in small amount of vaginal bleeding, which may be accompanied by symptoms such as pain in the lower abdomen. 4. drug factors: in sexual life did not take contraceptive measures, sexual life after oral emergency contraceptive pills, may cause withdrawal bleeding, will lead to a small amount of vaginal bleeding symptoms. The tenth day of menstruation and a little bit, and frequent occurrence of such a situation, it is recommended to consult a doctor for appropriate examination, clear causative factors and timely treatment.