Thanks for writing your query.
It is a good sign that you child is behaving normally. It means that there is only soft tissue injury
and there is no internal brain injury
Fever experienced by your child can be due to viral fever
accompanied by sore throat
and runny nose.
You can give him Paracetamol
@ 15 mg/kg body weight and can be given 3-4 times in a day.
This will help in reducing the pain and fever also.
For runny nose and sore throat antihistaminic medicines can be given. All medicines are to be given after getting him examined by an Paediatrician.
Also advice him for rest as this will help him to recover soon from his illness.
I hope this is helpful to you.