can be a result of the concussion injury
to the brain that can result in haemotoma formation.
You should have proper investigation that probably is CT scan
of the Brain with contrast that can show any abnormality such as Blood clot within or out of the Brain.
Also have proper medication for the headaches such as Tab. Synflex 550 mg twice daily for 03 to 05 days.
This will surely treat your symptoms of headache.
I hope I am successful in solving your query If you have more you can ask me.
Take care and have good rest.
Dr. Azhar Sattar