Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, you should not worry much.
Your headache is mostly due to scratch on the
scalp (outer skin layer of skull).
I don't think you are having internal
brain injury.
So nothing to worry much. Follow these steps for better symptomatic relief in headache.
1. Take painkiller and anti inflammatory drugs twice daily.
2. Apply ice packs on lesion.
3. Apply antiseptic cream locally on lesion.
Don't worry, you will be alright with all these in 1 week.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.