Thanks for writing your query.
After reading your post, it seems that the lump on your head is due to soft tissue
Though it will subside by its own in few days to weeks time, taking pain killer will help reduce the pain and will help in early recovery from the swelling.
Along with Tylenol
. you can take antiinflammatory medicine like Ibuprofen
one tablet twice a day after meals along with an antacid like Omeprazole
If the problem persists, get yourself clinically examined by a Neurosurgeon.
I hope this is helpful to you.