Alzheimer's disease is the most common cause of dementia. The word dementia describes a set of symptoms that can include memory loss and difficulties with thinking, problem-solving or language. In the initial phase, the person affected by Alzheimer's disease will usually look forgetfulness, such as forgetting names of objects or places, forget about the events that recently passed, and forget about the contents of the conversation which had recently shared with others.

Time by time, the symptoms will be increase. People with Alzheimer's disease will be difficult to plan, trouble speaking  into language, difficult to make decisions, often looked confused, lost in a place that they already knew, anxiety disorders and decreased mood, and underwent a personality change, such as suspicious, prosecutors, and aggressive. In severe cases, patients with Alzheimer's disease may experience delusions and hallucinations, and not able to perform activities or even unable to move without the help of others.

There are several factors that can increase a risk of Alzheimer's disease, among them is a lifestyle that is not healthy, female sex, aged over 65 years, have a parent or sibling is sick of Alzheimer's, had a history of heart disease, and had been wounded heavy head.

The disease can not be cured yet, but the treatments making  slow the progression of the symptoms. There are several things to prevent Alzheimer's disease, including by lowering the risk of heart disease, maintain a healthy weight healthy, eating healthy foods, regular exercise, reducing alcohol consumption, quitting smoking, keeping the brain in order to remain employed, and regularly went to the doctor with age.

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