Hello,
I agree with your family Physician that it is not a major
injury but just that he has hurt the muscle.
In case the pain does not come down in 3-4 days of the time you can take up the x-ray of the shoulder and
cervical spine to get rid of the doubt you are having.
Usually, when the fall occurs there will be a direct impact over the muscular system which can lead to Inflammation of the muscle fibres and pain. This is common in falls in kids.
Also doing a hot water fermentation over the painful area should help reduce pain.
Rest assured, your son do not have a major injury. Also, the kids complain more often to the extensive level where parents get panic but it will be only a minor
muscle pain which kid cannot bear it.
Hope you will not take much worry and tension and it's assured that the kid will be fine in 2-3 days of time.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Jay Indravadan Patel, Physical Therapist or Physiotherapist