I have had an off-and-on sensation of tightening and strain in the external front neck muscles, and the lower part of my face, for the past 3 days. It isn t painful, just tightness....doesn t interfere with breathing or swallowing, but I don t understand why I have it one day and then the next it s OK. I sometimes do head-neck rotations as part of my regular exercise, but this has never resulted from doing that in the past, so wondering why it would cause it now...? I am a 66-year old male and otherwise in very good health. Any thoughts would be appreciated.