What are the side effects of a gastric sleeve?

Possible side effects of gastric sleeve surgery include soreness at the incision point, inability to eat solid foods and dumping syndrome, which occurs when food moves to the small intestine faster than normal, according to WebMD. This causes diarrhea, nausea and shakiness.

Other potential effects of the surgery include inflammation in the stomach lining, leaking where the stomach is stapled, poor nutrition and scar buildup with the potential for bowel blockage, according to MedlinePlus. During the gastric sleeve surgery, the surgeon removes a portion of the stomach, which requires general anesthesia. Like all surgeries, potential risks include blood loss, blood clots, allergic reactions to anesthesia and infections. The patient's diet after surgery consists mostly of liquids and soft foods in small amounts.