###Human: Why do I have uncomfortable feeling between the middle of my spine and left shoulder blade? ###Assistant: Hello. The popping and discomfort what you felt is either because of improper scapulothoracic mobility or may be due to facet joint irritation in the neck with intervertebral hypermobility. Which could have caused due to stiffness in the chest muscles, shoulder stiffness, etc.  I would recommend you to do a lot of icing in the chest and back muscles. Maintain your neck and upper back posture by doing some back retraction work. Gently stretch your neck and chest. Gently massage your chest and shoulders to relieve tension in the muscles. I hope this is helpful for now. Kindly revert in case you need any help in this regard.