Other possibilities may be hypothyroidism, hypoparathyroidism, peripheral vascular disease, peripheral nerve compression,
vitamin B12
deficiency ,malnutrition causing low sodium,calcium and vit D deficiency, transient ischemic attack, motor neurone disease, or autoimmune disorders like multiple sclerosis or lupus erythematosus,fibromyalgia and chrinic fatigue syndrome
I feel that without clinical examination and investigations,diagnosis is tough.