Thanks for your query.
Headache + vomiting
were most likely due to hangover along with acute alcohol-induced stomach irritation
. Persistent headache is apparently due to blunt injury
over head. A short course of Anti-inflammatory pain-killers will cure the concussion
effects. Get a dressing done of the gash wound over the scalp
Consult your doctor and apprise him of my opinion. I am certain that he will agree with me, order required tests, and- based on the reports- will prescribe suitable/modified treatment as advised.
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Dr. Rakesh Karanwal