My friend gets tight and sharp pains between her neck and shoulder. She says it feels like someone is squeezing her shoulder and feels lots of pressure and gets sharp pains at times. She also says it gets worst when she lies down and the pain gets really bad when she raises her arm past a certain point. It has progressively gotten worst in the last four months. She knows it started when a large heavy box fell on her shoulder but doesn't know if it will eventually get better on it's own or should see a professional. Does anybody know what it could be?