Thank you for your query,
As there are no any abnormal symptoms of head injury
nothing to worry.
For headache you can give Tylenol
every 8 th hourly depending on the presence of headache in prescribed dosage.
If the headache is severe instead of Tylenol you can give ibuprofen
in prescribed dosage.
Observe for vomitings, altered behavior, paucity of any limb movement and if you feel any abnormal report to emergency immediately.
If the headache is persistent consult your Pediatrician
Hope I have answered your query.