My father got a stroke twice but on different years. First was on October of 2008 and the second was on November of 2009. Thankfully, he recovered. But there are times,especially during the evening when he starts talking about things in the past, most of them are not familiar to us. Or sometimes he takes anything random as topic like pictures or any objects or words he hears. I'm worried because he never stops talking. Then, what worries us more is the next day, he starts being hot-tempered. What should we do during these times? He's also diabetic, does it have anything to do with low sugar? Please help.