Missing class tonight due to an illness, I figured I'd take the opportunity to remind people that training while sick is not a good idea. Especially as we get into flu season, some people unfortunately need to be reminded that they have a lot of classmates who would rather not get sick if they can help it, not the least of which is having a sick classmate show up to ruin their week.
But even beyond simple stay home if you're sick, there are the Pig Pens of the world who go a step further and show up with something a little more troubling than the sniffles. Check out the following links for a refresher/reference guide to awful things you don't really want to see pictures of, let alone see on people at your school:
The makers of Defense soap have a fairly comprehensive section on skin diseases with causes, treatments and disgusting pictures. See the right sidebar for the links (but there are some unfortunate broken pages mixed in). While you of course have impeccable hygiene, it might be worth forwarding their guide to hygiene for combat athletes to your classmates who don't.*
Skin Infections and the Wrestler is a short pdf detailing a couple common conditions that you encounter in the dojo and what to do about them. I'd like to point out that it does give one bit of advice that the other guides didn't: "Do not wrestle with someone who has [whatever]. Alert your coach or an official."
While it hopefully isn't necessary to snitch on Pig Pen, pointing out that they're not fooling anyone with their, "oh, I didn't notice that" does need to be reiterated. Someone didn't notice the big rash/fact that it's painful to open their mouth/bleeding? Of course they didn't. If they won't act responsibly, perhaps they'll react to varying degrees of shame.
A couple other articles that you might find interesting: