im now my grandads full time carer.. my nan passed away on friday and my grandad has jus been diagnosed with dimentia a few months back

can anyone tell me what i can kind of expect?? i have been told he will get worse and i dunno if i'll cope i dont hardly sleep cos he walks in and out and around the house all night .. i have to repeat everything a million times and i have to literally get him to change his clothes everyday and wash himself... and listen to his long stories again and again... what happens with dimentia? how bad does it get????????

thanks xx