There are a number of things that can cause difficulty swallowing - dysphagia (the medical term)
Some of the causes that would need considered:
A narrowing in the esophagus (a stricture) which can be caused by esophageal reflux
A neuromuscular problem (nerve-muscle coordination problem) which would probably be associated with some other problems (coordintion, weakness, difficulty walking)
Statiscally speaking - reflux is by far the most likely of these: Here is some information for you on the subject
http://www.aafp.org/afp/20011201/1853.html__________________
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