Some other theories of a cause are viral infection or toxic damage from aluminum. However, these cannot be proven. The Symptoms of Alzheimer's The most common symptom of Alzheimer's is the increased loss of memory. The long term memory isn't affected, but recent events and actions are forgotten easily. Speaking and understanding loosen over time.
People forget words and sometimes even their family members.
It is very disappointing and sad to visit a relative with the disease, because they forget who you are. Everyday functions and activities are forgotten as well. A person will be unable to dress themselves or use the bathroom. Eating properly and walking require constant help and aid. In some instances, a person who has the disease will become very aggressive.