Do you do neck strengthening? I was introduced to this rutine by my wrestling coach. Strong neck is a great asset in martial arts, there are opinions that this type of training is questionable and too dangerous. I have found that this type of training helpful, with neck pain and thorasic spine problems after my injury. I know many Polish wrestlers who do this workout and most of them have no problems with the neck.
This type of training is not recommended to some people, after injuries (it helped me), also taking in to account strength of the neck. In boxing preffered method is use of the weights.