For years my wife has struggled with stomach issues. Some days she can eat a certain meal and have no issues, then eat the same thing for a meal the next day and become nauseous and vomit. Today is one of those days. Yesterday she was fine and having no stomach issues, but today she ate a meal that she eats often and has been vomiting all afternoon and evening. Once all of the food is gone she starts to feel better and can go days or weeks until she has issues again. Not only does she have nausea but the stomach pain can be very intense.
My wife's MS symptoms have come and gone through the years, but the stomach issues seem to be something that sticks around. Sometimes she's gone weeks or months without having issues then out of the blue she can't seem to eat anything without becoming sick immediately. I know it's quite frustrating for her when she knows that no matter what she eats she becomes sick, and so far we haven't found anyway to stop it other than just waiting it out. Multiple Sclerosis can definitely be frustrating at times, and we will keep looking for patterns of why her stomach is having issues. Until we figure it out, we will continue to make sure she is eating right, drinking plenty of water and doing the other things we know to treat her MS symptoms.