Thank you for posting your query.
The swelling on the forehead is likely to be due to a scalp hematoma
(bleeding underneath the skin over forehead). It would subside on its own within a few days.
also would subside soon.
For symptom relief, your friend could take ibuprofen
tablet for headache and betahistine
If symptoms persist, a CT scan of the brain may be done.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist