Lack of blood supply to the legs as a result of plaque formation in the blood vessels, diabetes, stroke,
multiple sclerosis and underactive thyroid,abnormal levels of calcium, potassium, or sodium in your body and a
lack of vitamin B12 can cause tingling in the leg. Get your blood sugar and thyroid hormones levels evaluated.
You can take some vit B12 for some days and see if the tingling is gone or not.In case the symptoms persist
then pls consult a neurologist. Hope it helps.Take care and regards.