Thank you for posting your query.
What you are describing is a scalp hematoma
(bleeding underneath the skin over skull). To understand if there was any contusion
or any other injury
to brain, CT scan
report of the brain is required. If you have them, please upload.
Then, we would be able to decide if any damage occurred to the brain or not.
Please get back if you require any additional information.
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad,
My personal URL on this website: http://bit.ly/Dr-Sudhir-kumar
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My blog: http://bestneurodoctor.blogspot.com/