Neck injuries can be acute trauma related, posture related or you may just wake one morning with neck stiffness that progressively worsens over the day. The causes can vary from facet joint strains, spinal disc herniations, joint degeneration and nerve impingement.
It is important to get the right diagnosis for your specific injury. Treatment may involved joint mobilization/manipulation, Soft tissue release, acupuncture, stretching and strengthening exercises.
Here are common neck stretches that are used for general neck tightness and posture problems. Only perform these if you are sure of your diagnosis.