Pain when sipping...... in POST-Operation Weight Loss Surgery Q&A Posted January 6, 2011 Yes i am 6 days out and I have experience the stomach pain more with cold liquids though. When I sip warm liquids not so much. It's getting better as the days go by. I just thi nk its part of my healing process. I mention it to my doctor before discharge and he said that it was common with some of his patients and especially when trying to drink cold beverages. He said stick to warm for now until I can handle the cold beverages better.