Medical Volunteering Abroad Bad for Resume?

I'm an M1 and I'd really like to do something abroad this summer, probably the entire summer if I can. I know a couple of organizations I've worked with before in Peru and Guatemala that have different medical volunteering opportunities as well as legitimate Medical Spanish Terminology classes (I can already speak fluent Spanish but medical terminology is like a different language even in English so I think it'd be cool). A classmate of mine advised against this because they said I wouldn't... Medical Volunteering Abroad Bad for Resume?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums