I scraped my hand the day before this thread opened..
i was thinking... wow.. that stinks.. (for her).. the next day.. where I scraped my hand on the liverock.. I had a large puss filled (mmmm, yummy) boil and my hand felt just like the article said, like I had arthritis..
luckily, now.. it's almost healed.. but I was a little concerned for a couple hours there..