Bright red blood 15 days after cesarean section is considered to be the result of incomplete discharge or incomplete restoration of the uterus. The contraction of the uterus after delivery will discharge the residual tissue and blood after the placenta is peeled off, is a normal phenomenon of post-partum recovery, usually lasts 4-6 weeks, usually from the beginning of the light red, slowly changing to light red to yellow. So this time may be caused by the malignant discharge has not been completely discharged, you can pay more attention to rest, do not overwork. If there is an increase in the amount of bright red blood afterward, then it is necessary to be alert to whether there is incomplete uterine regrowth, caused by intrauterine residuals, and it is necessary to consult a doctor in time and choose the appropriate way of treatment. If the mother has obvious abnormalities, then it is recommended to seek timely medical treatment, symptomatic treatment.