My father brother is aged 75yrs he has go diabetics and takes Metformin 500 and glimepride 1 mg tablets,he is frequently urinating in bed during night hours  and also urinates in day time,he says it is without his knowledge but we see him urinating in toilets in day hours and also attimes it gets leaked in his dress.The smell that occur in the toilets or in the bedspread is very bad .pls suggest how to control the urination or any tests and medicine needs to be taken