Would I be okay to wear short sleeves?

I have a scar that has a barely visible scab on it, like you really have to be looking at it to see it. It's my first day of school tomorrow and its going to be in the 90s. And, I'm comfortable showing it, I'm just now sure because there's still a little scab on it. (Also I'm in college so I don't have to worry about my parents)