1. See a physiotherapist 2. In the meantime give your body position some variety - standing vs sitting, left-handed vs right-handed mouse use etc 3. Get a lac

1. See a physiotherapist 2. In the meantime give your body position some variety - standing vs sitting, left-handed vs right-handed mouse use etc 3. Get a lacrosse ball and make a habit of doing a few minutes of manual therapy on your upper back each day - between the shoulder blades, just over them, and on your traps, all of these with your shoulders in varying positions - there are quite a few decent articles and youtube videos about this. 4. Seriously - see a physiotherapist.