Thank you for your query on Healthcare Magic.
What is the age of your son?
Any history of trauma?
Any swelling or pain to touch in these areas?
This information is important to advise you further.
But for pain you can give Tylenol
in prescribed dosage for the child in pediatric dose.
Consult your Pediatrician
to look for the causes of pain and its management.
Hope I have answered your query.