At what age does dementia usually start?
Key points. Alzheimer’s disease is the most common type of dementia. Early symptoms typically appear after age 60, and the risk increases with age. Learn more about Alzheimer’s disease, including who it affects, warning signs, and what to do if you think you or a loved one might have it. Memory loss is often the first and main symptom in early Alzheimer’s disease. It is also seen, although less often, in early vascular dementia and dementia with Lewy bodies (DLB). Memory loss is not common in early frontotemporal dementia (FTD).