Other causes are hypothyroidism, eating disorders like anorexia
, Vit B12 deficiency, Lyme’s disease, 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).
Numbness and tingling in sleep predominantly during sleep can also be a sleep disorder. Take care!