Blood clots. A blood vessel might be blocked by an embolus. This can be a small mass of debris that moves through the bloodstream. Or it could be blocked by a thrombus. This is the blood clot. Intestinal ischemic syndrome: A blockage within the blood vessels bringing about your gastrointestinal method. https://www.sgvascularctr.com/a-comprehensive-approach-to-lymphoedema-treatment-a-vascular-surgeons-perspective/