Alzheimer disease makes a patient more vulnerable to falls, these patients must be monitored to prevent falls. The disease progresses at slow pace, if you find a sudden deterioration there might be some additional problem like brain stroke
, infections like, pneumonia
, urinary tract infection
, sepsis etc to cause this type of sudden change.
Your mother needs an urgent medical attention for the paining bruise
and for the HIGH POSSIBLITY OF FRACTURE
AT HIP/SPINE. Fractures are very common in elderly.
Please don't make her bear body weight till fracture gets rule out because it may dislocate the fracture.
I hope that answers your query.