<s>[INST] Dear Doctor Good evening. My father (age 65) is having pain on his left arm for last 3 days not able to lift his hand properly or not able to rotate his hand... checked with our family doctor.. got some pain killers but the pain still continues.... is this may cause a stroke... or Heart attack etc.. [/INST] Hello, Welcome to Chat Doctor. Thank you for providing the brief history. What I can understand with the history is your dad may have either of possible problems - polyarthritis of the shoulder or RCI. I will advise to use icing if your dad isn't diabetic. If he is diabetic then use hot water fermentation. Having sessions with guided physical therapy should help reduce pain, regain strength, improve the ROM. It is definitely not a stroke or heart attack. Be assured. Regards </s>