Hello Chronic Postural fault lead to such pains. To get the pain reduce go for acoustic wave treatment. It's the advance treatment of physiotherapy,  not available everywhere. We are only a few doctors in India who is practicing this. ACOUSTIC WAVES will give u instant and long term relief.

In my opinion u should take proper consultation to rule out cause of pain

You should consult a Physiotherapist or Orthopaedist in person for complete assessment and treatment.

Check your posture . It may be arising due to postural instabilities or sometimes it can be due to gas. Consult a physiotherapist or an orthopedic doctor so that you can get your posture evaluated

This wont happens untill you a obese or working style or family history of arthritis, if you need proper treatment answer to these are to be known. Or you can consult in person at nearest physiothetapy centre or neuro physician for proper diagnosis and treatment.

Are u a sports person or any old history of neck pain or u r very obese or any family history of arthritis After these questions's answer consultants can diagnose ur problem

✔️You should go for ice application on painful site ✔️Scapular strengthening exercise like      Scapular blade squeezing exercise      Shoulder girdle exercise      Shoulder shrug exercise      Rowing exercise ✔️Avoid sleeping on painful shoulder ✔️If you can visit physiotherapist near you then you can even go for some modalities which would be helpful for pain relief