Pick's disease is a type of frontotemporal dementia, a rare neurodegenerative disease that causes progressive brain cell damage and symptoms include dementia and memory loss. The term "Pick's disease" was previously used to describe general diseases related to frontal lobe dysfunction in the brain, but now specialists use it to describe a specific disease that is a specific cause of frontal lobe atrophy. Some people use the term "Pick's disease" to describe general clinical conditions related to the symptoms of frontal temporal atrophy, but this has led to confusion among specialists and patients and so its use should be limited to the subtype of the disease as described below. Symptoms include difficulty speaking, difficulty thinking and planning, difficulty communicating with family, behavioral changes with unjustified anxiety, and difficulty maintaining appropriate social behavior such as: disobedience and misunderstanding. Hyperactivity, negativity, and loss of will are symptoms of the disease. In contrast, sudden changes in personality and behaviors enable the doctor to distinguish Pick's disease from Alzheimer's disease.