My grand mother is 85 years old. These days she is fogetting stuff. She will wake up in the middle of the night and says that she needs lunch as it is already mid day. She keeps shouting our names day and night for no reason. when we go and ask what happened, she gives all foolish reasons. My family members could not sleep at all. Our neighbours started complaining. We tried logically explaining. She says that she understands, but she continues to shout/scream. We don't know what to do. Also her hearing is only partial and she has a habit of smoking tobacco. Kindly help me in understanding the problem and let me know if there is any medical evaluation required.