Back surgery usually requires 10-12 days to remove the sutures, the specific case for back surgery to be locally sutured, usually need 10-12 days to reach complete healing, at which time the sutures can be removed. However, in the case of elderly patients with chronic wasting diseases, such as diabetes and malignant tumors, the surgical incision usually does not heal even in 10-12 days. If removed completely, it may lead to incision dehiscence and even complication of infection. Therefore, such patients need to delay the removal of sutures, which can be pushed back 2-3 days until the incision is completely healed before removing the sutures to avoid causing the incision to split. Patients should enhance nutrition after lumbar surgery to promote the incision to recover as soon as possible in order to achieve the requirement of suture removal.