What do we do about mom and her outbursts/anger at night?

Lots of elders with dementia and Alzheimer's have great difficulty as the sun begins to set, aka Sundowners. You don't say what type of place your mom is in, ie: Memory Care Assisted Living or Skilled Nursing, etc, but the staff should definitely be very familiar with behavioral changes among residents in the evening hours, including aggression. My mother is in a Memory Care community where most of the residents are in worse shape than she is, mentally. So........they can get knocking on her door, thinking it's their room, which sets my mother off into a fit of fury like I've never witnessed before. She screams and yells and calls them horrible names instead of simply letting them know they're in the wrong place. Dementia has no rhyme or reason to it, does it? Please do NOT consider taking your mom home to live with you...........it's just too much to deal with as they progress down this road and worsen.

If your mother is refusing to wear her glasses and her hearing aids, then she's likely to be having even more behavioral troubles as she will have difficulty knowing where she is in space. Poor eyesight & poor hearing = trouble. If the care givers can find an effective way to help her on with both of these items, she'll be much better off.

Here is a link to some useful info about Sundowners:
https://www.seniorliving.org/health/sundown-syndrome/

Be sure to speak to the staff at your mom's community to make sure they DO have experience with memory issues/dementia/Alzheimer's, so you can feel assured she's being properly cared for and doesn't have to placed elsewhere.

Best of luck!