Left side pain. Thoughts on what it could be?

Lap band was put in May 2012. I lost 146 lbs. since last December I have made poor choices and have gained back 35 lbs. but lately I've had some moderate pain on my left side right were my stomach is. A little tender to the touch. No vomiting. No reflux. No constipation. No fever. Like a dull to sharp moderate throb pain. Thoughts on what it could be? Maybe just my band angry at the gain?

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