Wound-healing problems are the most common complication of this operation, more than with a cosmetic tummy tuck, because the patients are often heavier, the incision is long, and the tissue being closed has been stretched and inflamed for years: opening of part of the incision, fluid collections (seromas) needing drainage, infection, and areas of skin at the incision edge that do not survive. Blood clots are the serious rare risk of any long abdominal operation and are why early walking and sometimes blood thinners are standard. Higher BMI, diabetes, smoking and a heavier pannus each raise the risk, which is why surgeons set weight and smoking conditions before agreeing to operate. Stretch marks on the removed skin go with it; those above the incision stay.