Should You Pop A Blister? That Depends

Should you pop a blister or should you let it heal on it's own?  Well, it just depends.

A blister is usually caused by friction to the skin or by a heat injury.  The skin in that area gets discolored, a bump forms and most of the time fluid fills the inside.  Some blisters are small, some large.  Some hurt, some don't.  Most smalls ones are just an annoyance for a few days.

So when do you pop a blister and when do you let it heal on it's own?