Esophageal stenosis (narrowing) from scar tissue (strictures) is of itself not painful.
However, depending upon how tightly narrowed the stricture may be, food can impact there (cause dysphagia). Usually dysphagia occurs with meats, bread. Pain on swallowing (odynophagia) may result. If you have a peptic stricture please chew food well, take small bites swallowed with water & take acid blockers.