Seeing anything and anyone close to you in pain hurts. It hurts most ESPECIALLY if it's your own mom. Seeing them hurting is what hurts most, so I would know what it's like, but not the same circumstances.
I can't necessarily do anything, but I'm hoping and praying for your mothers well being. Please, hug her for your own sake and for me. I wish for the best of her, and that she will recover from what she's going through.