People who have scleroderma also might have symptoms of A further autoimmune ailment which include rheumatoid arthritis, lupus or Sjogren syndrome. Veins carry blood back again to the guts once the oxygen is taken off. Once the vein is blocked, blood backs up in the intestines, triggering swelling and bleeding. https://www.sgvascularctr.com/treatments-for-gangrene-insights-from-a-vascular-surgeon/