The present invention provides systems and methods for treating wounds in patients who lack the innate ability to regulate glucose (e.g., diabetic patients). In one aspect of the invention, a method includes positioning an internal bypass device within the duodenum to inhibit contact between chyme passing therethrough and an internal wall of the duodenum and maintaining the internal bypass device within the duodenum for a sufficient period of time to decrease insulin resistance and reduce a blood glucose level in the patient. The internal bypass device increases peripheral blood flow and elevates an immune system response to accelerate healing of the wound.