This question is concerning my 75 year old mother. for the last week my mother has been saying she sees people in the house. i believe she is having visual hallucinations. she has not been diagnosed with any type of dementia. please help?

Your mother may be seeing what you are not seeing and does not mean hallucinations nor mean that she has dementia nor psychosis. There are people that could see the parallel world that everybody is not privileged to see because of heightened sensitivity. Amy Allen is one of such people if you know about Dead File program on TV. If they are not hurting her leave them may be best, and be yourself.

She is likely experiencing delirium. Best will be to have her evaluated by her primary care doc as a variety of conditions may contribute from not taking her meds the way they were prescribed to a urinary tract infection for example with many other possibilities, specifically related to her known medical conditions.

Recommend finding answers from a clinical neurologist. Some forms of dementias are tough for doctors to diagnose, but what you describe could represent early Lewy Body issues. This can be treated, and reversed via appropriate medications.