For example, symptoms of dementia in the most severe stage include not being able to perform activities needed for everyday living, such as bathing oneself.
Mild Cognitive Impairment
The first stage of dementia is really not dementia. Rather, mild cognitive impairment is between what are normal memory problems due to aging and the full onset of dementia. A patient with mild cognitive impairment may take longer than she used to when working on more difficult activities using mental capabilities.
She may have trouble when problem solving or when she needs to do multiple tasks at once. Memory problems may occur, such as issues remembering conversations or events that recently occurred.
But these issues with memory and thinking do not impair everyday tasks as full dementia does. While people with mild cognitive impairment can develop dementia, MedlinePlus noted that some people do not get dementia later.
https://www.empowher.com/dementia/content/what-are-stages-dementia