Half a month after the abortion, there is still a small amount of blood, which may be caused by intrauterine infection, intrauterine residue and poor uterine contraction. 1. Intrauterine infection: it may be due to improper post abortion care, resulting in infection in the uterine cavity, there may be a small amount of blood half a month after the abortion, often accompanied by pain in the lower abdomen. 2. Uterine residue: caused by incomplete abortion, if there is still residual pregnancy tissue in the uterus, there will be a small amount of blood half a month after the abortion. 3. Poor uterine contraction: If the uterus does not contract well after abortion, it cannot compress the blood vessels and lead to bleeding, and there may be a small amount of blood half a month after abortion. When the patient appeared abortion half a month and a small amount of blood phenomenon, it is recommended to go to the hospital gynecology consultation, so as not to delay the condition.