Hello Doctor. This is regarding the health of my mother, who is 84 yrears. Past one year, she seems to get aggressive for one or two days in a month. She keeps yelling at everyone, saying they have all her belongings. Keeps packing her bags and tries to go out. We have to retain her forcibly. But after a day or two she looks very tired and seems like recovered from a major depression and becomes normal. We doubt it is some sort of sickness and would like to have your opinion in this regard pls..