Thank you for your query on Healthcare Magic.
The injury might have impacted on the temperomandibular joint (TMJ) and the ear.
But some times sudden blows on the ear may lead to perforation of the tympanic membrane of the ear leading to ear pain.
Teeth should be examined for any mobility and for fractures.
The TMJ joint should be looked for any dislocation.
For pain you can give an analgesic
in prescribed dose.
Give soft diet
so that child will eat easily without the strain of chewing and give plenty of oral fluids.
Child needs physical examination to look for ear injury
like tympanic membrane perforation, TMJ joint injury and inside oral cavity examination to look for teeth and mucosal injury.
Therefore I advise you to consult your Pediatrician
for the examination and for proper management.
Hope I have answered your query.