It's due to myofascial trigger points presence in supraspinatus ,teres minor ,major , lattismus dorsi and upper trapezius muscles of shoulder girdle ..
Next Steps
just CHK out to a
sports physio clinic and request him/her to release all these mentioned muscles by manually or through dry needling and kinesiolocial taping
Health Tips
learn all stretching exercises fr neck and chest and shoulder girdle muscles ..