The etiology of paraesthesia includes apart from vitamin B12 deficiency, alcohol intake, hypothyroidism, diabetes mellitus, malnutrition, trauma, connective tissue diseases like systemic lupus erythematosus
, certain antibiotics, pyridoxine overdose, lyme disease, leprosy etc. you can try correcting the nutritional deficiencies and possible overdoses and alcoholism. Consult a neurologist for further work up and management. Hope this helps .Take care.