Two months ago, I had surgery for colon and rectal cancer (most of colon removed, rectum removed, anus sewn shut, hysterectomy, colostomy closed and replaced with an ileostomy). Was in the hospital for 33 days. Was home 2 weeks and ended up in Hospital for another week. Electrolytes were critically low due to high output from ostomy. Now get 12 hours infusion daily (TPN). My magnesium has been high. I have been getting a pain in my left side (thought I pulled a muscle doing my physical therapy). Today it seems to begetting a bit worse when I drink fluids. Can it have anything to do with my surgery?