What Is The Treatment For Sore Upper Back Pain?

Hi Doc, I am a professional working in a leading MNC in Mumbai, as you might have guessed till now, i am subjected to long hours of work and i have to be seated all the time. Off late, i have developed a sore upper back pain in the morning. The moment i wake up, my upper back and mainly my shoulder/neck area really ache. I reckon it can be the way i sleep, but i always sleep straight or on my side and never on my stomach. Please help.