Yeah. Superficial shit only. That said, it'd probably stabilize something nasty like a gut wound. I've pulled it off before. It's tricky, but worth a shot if it's your only option.

[Like most magic, the rules of this particular spell aren't exactly set in stone, but it's easier to manipulate the spell beyond its natural limits if you're more experienced with magic. Still, attempts at healing never hurt anyone, especially in a place where medical options are limited. A shoddy healing job is probably better than nothing.]