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The numbness could be due to nerve compression. This is possible at various levels. It could be due to compression of the spinal nerves at the cervical spine level or, ulnar nerve at the elbow level. Hypothyroidism, diabetes, tumors and infections of the ulnar and spinal nerves and rheumatism can all cause numbness of ring finger. Please consult a neurologist. Very cold climate, peripheral vascular disease, leprosy, alcoholic neuropathy, Vit B12 deficiency, Addison’s disease, adrenal causes like pheochromocytoma, anemia, Buerger’s disease, chronic fatigue syndrome and Raynaud’s disease are the other causes You will need some tests like treadmill test, color Doppler, angiography, ultrasonography and MRI (magnetic resonance imaging). It is difficult to comment beyond this on net without examining you and a detailed history. Please consult your PCP to begin with. Take care!
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