There are many types of dementia but he most common causes include Alzheimer’s disease, vascular dementia, frontotemporal dementia and dementia with Lewy bodies. While it is more commonly experienced in older people, dementia can sometimes occur in those under 65 years of age. This is known as younger onset dementia. One in ten people over the age of 65 experiences dementia, while three in ten are affected once they reach 85 years of age. Understanding the symptoms associated with each type of dementia can help in ensuring each person’s care needs are met.