I wish I could ANSWER this... but in reality, I have a similar QUESTION.  But I have a feeling that the answer may very well be "yes."   I have never had acid reflux.  A while ago, I would get acid reflux if I didn't eat for a while.  Once I ate, things would go back to normal.   Recently, however, I started occassionally breaking out in milld hives.  Just an itchy bump here and there.  This eventually stopped.   However, now I have almost consistent acid reflux for the past few days.  And, starting yesterday, the lymph node in my neck/throat on the right-hand side has been bothing me.  I don't have a full blown cough or a sore throat (except for the pain from the acid reflux)... so I doubt it is a cold or something else.   I have not tried any medications yet, but I think that if I treat the acid reflux, my lymph node problem might go away.  In the meantime, the allergic reaction seems to have already subsided on its own.