To see your neck in your dream signifies the relationship between the mind/mental and the body/physical. It represents willpower, self-restriction and your need to control your feelings and keep them in check. Consider the familiar phrase, “don’t stick your neck out” which serves as a warning against a situation.
To dream that your neck is injured or sore indicates a separation between your heart and mind. There is a literal disconnect between how you feel and what you think. You are feeling conflicted. Alternatively, the dream represents something or someone, who is literally a pain in the neck.
If you dream that your neck is thick or swollen, then it represents your quick temperedness.