It is not very happy news that you are suffering from shoulder pain at night. I cannot take pain. First, take pain med with some tylenol #3, Norco... you are not going to be adicted because that , and free yourself from pain. 2nd, you must find out if which system is affected, nervesystem or skaletal system. in meantime, try sauna as tolerated, stay in till you can take , 15min or 30 mins[ dry heat] and take shower with warm water. The most of joint pain is caused by lack of circulation to the area. Slow dowm exercises until find out the cause of pain. I have seen the success after replacement of joint surgery most of the time, but you don't know it could be just nerve system, surgery is not so good.Anyway, Don.t suffer with pain. I eat up my words that I will not come in here, but I had to say what I think will help you free from pain. It is more important to help friend than save my face and word. One more thing, you have only one body and it is your responsibility to gard and protect, donot cut and have surgery unless you have 2nd opinion, which means get independent opinion[AMA system is one net work and no 2nd opinion from different doctors name.]There is nothing more important than your health , free from pain. Make the first thing to get better.