If you were choking in a dream, then it symbolizes some situation or aspect you will find hard to approve. The dream could also show your inability to show what you are actually thinking, especially if you were chocking on food. If somebody else tried choking you, then it means you are struggling to show the various emotions such as frustration, affection and apprehension. Perhaps someone in your life is trying to give you the pressure therefore you feel like you cant breathe normally. If you were the one who was choking someone else, then it shows your rage towards some particular person. There is a possibility that the subliminal mind of yours helps you to keep your mouth shut and do not tell certain things to particular people. The internal stimulus such as the actual choke could wake you up, in this case the dream has no meanings at all.
Read more about dreaming of Choking in other dream meanings interpretations.