Hello madam, I understand your concern about your husband.A diabetic patient can have tingling sensation in his body as a result of nerve damage due to high blood sugars,but the pattern of these sensations is usually chronic, symmetrical in both feet extending upto legs(sometimes upto thighs and trunk also) and both hands extending upto forearms(sometimes arms and face also).But this is usually symmetrical and chronic.In your husband s case it appears to be an sudden episodic, sharply demarcated to one side of the body including face and tongue(which is unusual).Being of sudden onset and restricted to one side of the body followed by recovery,these sensory symptoms mandates a neurological consultation to rule out a vascular event like a transient ischemic attack or even stroke(although,sharp demarcation of sensory abnormality including face and tongue is rare in stroke).Improved and now limited symmetrically to both feet and shin area,is something i mentioned above and well explainable with diabetes.I hope it will be of help.