Thank you for posting your query.
Based on the description, you seem to have suffered a mild head injury
with a scalp hematoma
(collection of blood underneath the scalp).
There is no need to worry, as there are no symptoms to suggest any internal brain injury
Your pain and swelling would subside in a few days. In the meanwhile, you can take analgesics such as ibuprofen
I hope it helps.
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
My blog: http://bestneurodoctor.blogspot.com/