Try not to have surgery when you have a cold because when you have a cold your body is in an inflammatory response. This inflammatory response is often systemic and may lead to localized infection or even suppuration after surgery. The incision after surgery usually heals poorly due to the inflammatory reaction or heals excessively and scars appear, so try not to have surgery when you have a cold. Surgery when you have a cold is traumatic. Colds require as much rest as possible to allow the body to recover better, and if the damage from surgery is superimposed, the body will likely not be able to afford it, and complications, liver damage, and damage to the surgical site are likely to occur. So the body should be in relatively good shape before surgery, as it is with all elective surgeries. In the case of emergency surgery, not having surgery is likely to be life-threatening, and a cold should not be an absolute contraindication.