Do video consultation with me on Practo by clicking on the following link below. https://prac.to/dr-pradeep-singh-ortho-surgeon-dir Dr Pradeep Singh Orthopedic surgeon

Hello dear Keeping your age in mind and recent onset of your pain you seem to have scapular dyskinesia and weak periscapular and rotator cuff muscles. I expect you to have recurrent neck pains and difficulty in throwing a ball. Also you might have increased incidence of hair fall, acidity, weakness, cramps etc. If you can relate with me please do get back and i will design a treatment protocol for you so as not to have similar problems in the future Regards Dr Vipin Gupta

Probably that's wasting of muscles might had radiculopathy cervical which had reduced there is waxing and wanning start physiotherapy Strengthening of neck and shoulder girdle might help

Visit an orthopedic doctor for evaluation .

There are various reasons for shoulder asymmetry.. it would be better if you could share the picture showing both the shoulders.. Is there any pain in that shoulder as well.. we need to also rule out some asymmetry in spine or hip which may be causing visible deformity at shoulder level .