Hello Dear sir I have shoulders pain for over one

Patient: Hello. Dear sir I have shoulders pain for over one year, I have done endoscopy its normal , CT scan it was normal full blood test no diseases were found but still I have the pain and it comes higher when I study or work a lot now I’m confused what to do I have visited lots of doctors but no positive results please kindly advise me what to do or what’s the treatment . Thank you

Doctor: