The hard lumps on top of the cesarean incision are mostly due to local scar hyperplasia, but they can also be seen in special cases, such as suture rejection, local infection or endothelial tissue ectopic, which need to be treated after clarifying the cause. 1, local scar hyperplasia: collagen appears and granulation tissue overgrows during the wound healing process, resulting in hardened scar, especially for pregnant women with keloid body, which may also appear as hardened keloid. Usually, the scar will gradually soften with time, and local heat and scar paste can be used to inhibit growth; 2. Suture rejection: some people have a rejection reaction to sutures, which causes local hardening of the incision, accompanied by pressure and pain, and even redness and oozing. At this time, we should go to the hospital to check and change the medicine on time; 3, local infection: local infection of the incision will lead to redness, swelling and pain, so we need to change the medicine in time and use antibiotics to reduce swelling; 4, endometrial tissue ectopic: endometrial tissue is brought to the incision during surgery, causing endometrial ectopic nodules, which can be felt as hard knots above the incision and can be surgically removed. If women have hard lumps above the incision after caesarean section, dynamically observe whether the hard lumps have gradually grown, if accompanied by pain or pus, it is recommended to seek medical attention in time, perform relevant examinations to clarify the nature of the hard lumps, and consider surgical incision if necessary.