Due to a fall, Dad had an CT scan of head done. It showed some abnormalities that prompted an MRI which showed brain atrophy leading to the diagnosis of mild Alzheimer's. He always needs something, has tons of Dr. appts that I take him to, gets into everything that he has no business touching, doesn't clean up after himself, and he stinks. I try to keep his diagnosis in mind as I deal with him but sometimes I fail. The other day was such an example. It was my son's 16th birthday and we planned on spending the day together. My father didn't remember the many conversations about it - that's ok. The irritating part was, he didn't care. All he cared about was what he wanted to do. He began name calling and lashing out at everyone that lived in the house. He was so nasty. At times like that I find it difficult to not become angry and give it right back to him. That day I walked away feeling resentful that he ruined another day. He did it again today. Dad literally would eat non stop and put me in the poor house doing it. . . He was heating up his lunch tray and while doing so he ate about 20% of the small birthday cake that was on the rack cooling. There was no time to bake another before the party. His only response was don't worry about him, he already had his piece. His attitude is Very Frustrsting! He ruined another day. How do I keep from feeling this way?