The symptoms can be due to peripheral vascular
disease or disorder of the circulatory system outside of the brain and
heart. Other causes could be ypothyroidism, eating disorders like anorexia, Vit B12 deficiency, Addison’s disease, adrenal causes like pheochromocytoma, anemia, Buerger’s disease, chronic fatigue syndrome and Raynaud’s disease. You will need some tests like treadmill test, color Doppler, angiography, ultrasonography and MRI (magnetic resonance imaging).