My father suffered the same thing a couple years ago. They kept trying to treat him for a sinus infection because of the headaches. We finally disregarded the regular doctor and went to emergency room. They took CAT scans and found blood on both sides of the brain and transferred him to a hospital that was better prepared to deal with it. Even there they were unwilling to do what was needed. They even contemplated sending him home hoping it would go away. My father continued to become more delusional. He could not even hold himself up in bed, but would slip and slide all over the hospital bed. We finally got the doctors to insert drains in his head. He has come back a lot, but there are still things that may never recover.
What we learned is that as you age you brain actually shrinks. When you are elderly, sometimes even sitting down in a chair hard can cause bleeding. You may never actually know the cause of this. We never did.
Make sure your family stays on top of the doctors and don't hesitate to push them if you think they are not being aggressive enough in treating your mother.
I will be think of you and your mother as you go through this. Have hope. Ask me questions about my experience dealing with this if you need to.
Twisting on Life's Rope Me53 W53 M20 D21 D19 D16 BD 2-2013 D final 1-2015 _________________________ "Dream about tomorrow, Live for today, Learn from yesterday"