The third day after the abortion back pain may be due to the following reasons: 1, after the abortion surgery did not rest in time, but to carry out heavy labor or long standing, this situation will cause the burden on the waist to increase caused by lumbar soreness, so in the first few days after the abortion try to pay attention to rest, to avoid doing heavy labor, avoid standing for a long time, you can take a walk appropriately, to be able to promote the contraction of the uterus; 2, in the abortion surgery because The fallopian tubes and the uterine cavity are connected to each other, there may be a small amount of blood in the pelvis to stimulate the pelvic cavity caused by pelvic congestion, thus causing back pain, you can massage or hot compresses on the local area, can effectively alleviate the back pain. After abortion, if the back pain is more serious, after rest can not be relieved, it is best to go to the hospital in time to check, if the pelvic congestion is serious may need anti-inflammatory treatment.