Thanks for your question.
Please clarify what injury you have suffered.
Do you have any fever?
Thanks for replying.
It is not normal to feel excessive sleepiness and tiredness after an external injury to the back of head suffered 3 days ago.
If you feel sedated it would be better to have a doctor look at you.
Do you have any more questions?
If done for now do take a moment to rate my answer as this is the only way we get paid for our work and time on this website.
You can always come back to the thread even after you ave rated the answer.
These symptoms are not a normal consequence of the injury you have described above.As I mentioned earlier it would be better to have a doctor look at you.