It's hard to say whether Alzheimer's patients are aware of their condition. Many individuals may be unaware of their condition (especially in the beginning and late stages of their disease). At the start, individuals may be unaware of their inability to remember because it will be very subtle. However, as their shortcoming become more apparent- this may lead to emotions of anger and frustration. As the disease progresses, individuals may not be lucid enough to realize their surroundings. Also, damage sustained to the brain may lead to individuals believing nothing is wrong.