i am 3 days po and am starting to get a bit of a sore shoulder. I think it is deffo to do with sleeping upright and not being able to stretch. Because I cant lift my arms very high my shoulders are so stiff… i think it must be something to do with the fact that your not really able to use your shoulders as much as usual. Try ice packs. I have used them today and it seems to help a bit and try just doing neck excersises, it seems to loosen things a little – not too much though u dont want to pull the stitches. Its working for me so hopefully this helps!! xx