Swallowing is something you rarely think about until it becomes a problem. A dry throat or the occasional lump in the throat might not raise concern, but persistent trouble with swallowing — known medically as dysphagia — can signal something more serious. Many people immediately think of acid reflux or throat infections, but there are several lesser-known causes that deserve attention, including achalasia, esophageal spasms, and narrowing of the esophagus due to scarring or inflammation.If you'