If so, get them help and remove them from situations that make them a danger to themselves or others.
Covering up only complicates the problem.
Only a few of these changes are needed to make a diagnosis. If there are many, or if they are severe, then the situation can be worse.
The process is progressive, and tends to escalate with age.
Link: https://www.mayoclinic.org/diseases-conditions/dementia/symptoms-causes/syc-20352013
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