See this thread:
Who's yer daddy?
I saw the Doc today - all is fine, numbness is common for this type of blunt trauma. He saw my "hamburger" arms and asked when I last had a Tetanus shot.
"Uh....I don't know"...so he had the nurse give me a booster.
With all the scrapes and wounds we get as bikers - EVERY LAST ONE of us should be damn sure we're up to date. I looked it up...this stuff can be DEADLY and swift!