Alzheimer's disease is chronic and progressive meaning that as more parts of the brain are damaged, symptoms become more severe. However, Alzheimer's disease affects individuals differently. It's unlikely you will have every symptom and there is no set time period for the appearance of symptoms. Common symptoms of early-stage Alzheimer's disease include mild forgetfulness or problems finding the right words. Family or friends may notice small changes in your usual behaviour. E. g. you may become confused easily, forget people's names or recent events, lose interest in hobbies or have mood swings. You may find it difficult to concentrate or make decisions. These changes are often mild and difficult to pinpoint.
Attribution: BUPA