Well, don't let it get worse, get to the doctor to make sure that it isn't an ulcer, or something else. You should never take a chance with the stomach area. My husband thought his stomach was the problem at one point in time, turned out he had pancreatitis, and nearly died from it. He had a bloated feeling, and couldn't keep anything down. Make your sister do to the doc. Hope this helps, good luck to you and your sis.
