Thank you for posting your query.
First of all, I would like to reassure you that the chances of any serious brain injury
is very less in your friend.
This is specially so as his CAT scan of brain is normal.
Headache can occur with mild head injury
For relief of pain, he can take analgesics such as ibuprofen, diclofenac
He should get better in a few days.
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad,
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