Hello, the early manifestation of dementia is close to memory loss. For example, forget what you just did, have time orientation obstacles, and even can't find the way home. Progressive memory impairment and directional impairment were gradually aggravated. In the late stage, patients lose the ability to take care of themselves, and their ability to identify time, place and characters is further reduced. Emotions also change gradually, with depression, negativity or restlessness.