Hi ! Do you have a history of lifting any kind of heavy weight in the past, following which you developed this pain ? Do you work a lot on computer and you bend your neck down to look at your computer due to the faulty position of the level of computer ? In the first case, it could be a major muscle spasm, which will gradually go away with lillte bit of physiotherapy and anti inflammatory drugs with muscle relaxant for some time. In the second case, you must try to improvise on your posture and take breaks inbetween your work on computer and do some stretching exercises. You have to also see a orthopaedic surgeron to exclude cervical spondylitis. In both the above noted cases, improvement will follow with drugs and physiotherapy along with optimising your posture during all your activities. However, if you do not get any improvement, or if the symptoms increase in their severity with however mild the neurological manifestations may be, you have to go both an MRI and also a specialist orthopaedic consultation. Hope this helps you in solving your doubts. Good luck.