V.C.
Although the mix-up is unfortunate, and the nurse definately should not have force fed the baby; neither thing was likely to have caused his reflux. There is no such thing as a "burnt reflux muscle". What you are referring to is probably gastro-esophageal reflux, which is very common in infants, and is often treated with prescription medications. The good news is, most babies outgrow it before they turn a year old. My twins had this problem, and were on 2 medication each until there were over a year old, but neither has refux now at 2 1/2 years old. Best advice, keep him upright as much as possible after feeding him; don't lay him down flat after eating!