I agree with CCFheartMD11. I must tell you that I had similar problems. Mine started back in 2009. I saw my doctor several times before he sent me for an MRI and a referral to a neurosurgeon. It turns out I have DDD (deteriorative disc disease) in my cervical column. I went through physical therapy for about 2 or 3 months and purchased a traction device for at home use, and use it from time to time (although it was recommended for daily use, I hate it but it helps). With the traction device at home, there are specific exercises that help to strengthen the muscles and realign the column. I hope this is of some help to you and your partner. Best wishes.
I think he should cuz it mught be something serious. So for best he should go.
I will be the first to recommend a doctor's visit, however, in my lifetime, I have learned that shoulder pain onset during sleep is often caused by the muscles being stretched for too long at one time--for example, laying in one position for too long. There are ointments that can relieve the pain and help the muscles relax. A pain reliever such as Aleve can provide immediate relief. The pain can also be a sign of something much worse, however. It's always best to have his doctor check it out!
The good news is that this is unlikely to be related to your heart. Sharp shooting pains associated with movement are more suggestive of a nerve problem, possibly a pinched nerve. Try to determine if any particular movements invoke the pain (turning head side to side, nodding head forward and back, arm movement, etc). If the pain persists, it may be worthwhile to have some xrays done to look for a cause (such as osteophytes, which are just bony outgrowths that are related to arthritis). If it is really bad, you could consider an MRI, but I wouldn't recommend that at this point.