Hi there
I had very bad nausea and spontaneous vomiting for the first few weeks after my SAH, and I still had it when I came home. I had to take a bowl everywhere we went, and often we couldn't go out. My doctor connected this with the extreme vision problems, saying that once I could see better, I would keep food down better. Actually the extreme vomiting stopped suddenly after a few weeks, to our intense relief. Since then I still have nausea occasionally. The following seem to help: I take an omeprazole (losec) daily now in the morning. I have plenty of fluid, and have some water with every meal. Not getting too hungry helps, too. I find if I bend over after eating, I tend to vomit. Initially I could only eat really slowly, a little at a time. I also had problems with my swallow being affected. It felt no different to me, but I had to do lots of swallowing exercises and it gradually improved. At first I could only have pureed food and thickened water! It is a big relief to have more control over the vomiting, now. My SLT put me onto a liqud Omega 3 formula, which is easier to swallow than large capsules. Your mum may also need to change her toothpaste.
So I think you may want to check for swallowing and vision problems. Hopefully it gets better soon!