When you have a "rash" in your arm, you "rush" to the doctor
I use
Spa to Eng
This one is fairly good.
I have to admit I've seen such terrible translations out there. In one glossary the sentence "You have an infection" was translated as "Tiene diabetes". Obviously this was a typo, but...oh my God!!
If you need something more specific I recomend
Eng to Spa