How do you say Ouch! in Spanish?

Mexico Bob recently posted about Marilyn Moss (Mexican Trailrunner), a blogger in the emergency health care field who published an e-book all of us ex-pats, visitors and would-be visitors to Mexico should have: Emergency Medical Spanish. 

It could be the best ten bucks you ever spent, if you're ever in a situation when you need medical help and your Spanish isn't fluent (which describes most of us). Use it to explain where it hurts, how you got hurt, and comprehend instructions from a non-English-speaking med tech or doctor.

 I'm just passing on the link to obtain the book and to learn more about it at Bob's blog, since he covered it, por siempre, better than I ever could. 

I have a copy on my desktop computer and one on my laptop and I plan to print out a copy to put in a looseleaf notebook. I'm sure Marilyn would approve. It's so comprehensive that just browsing through it will improve your Spanish, even if you haven't been stung by a scorpion, lost an encounter with a stingray or suffered first-degree sunburn.