To add to the collection of stretches, here are some simple ones for your neck to encourage full range of movement. As always, take them gently....

1. Sit tall maintaining good posture, keep your shoulders down and tilt your chin to your chest then bring your head back to looking straight ahead.

2. Sit tall maintaining good posture, keep your shoulders down and tilt your chin to the ceiling, return your head back to looking straight ahead

3. Sit tall maintaining good posture, keep your shoulders down and tilt your right ear to your right shoulder, then your left ear to your left shoulder

4. Combine the movements so that you circle your head round using the full range of movement you have, circle one way then swap and circle the other way

I'd do a number of each, you can combine 1 and 2 but move through the movements slowly and feel the benefit of the stretch.

Enjoy :-)