question: My sister just called; she was told that she has a stomach infection/ She has pain in her right side that moves from front to back at times she seems to swell some and then it goes away. just begain to have loose stools with muscus in it, after dealing with the pain and discomfort for several months they finally sent her for a Scat scan they gave her medication an told her she had a stomach infection and now her blood pressure is staying about 98 high part What is stomach infection and what does this mean for her?? I am worried.