I am 5 months postpartum and just started wearing a corset. Has anyone here tried wearing one and is it effective?

It depends what corset it is. If it's the steel-boned one, I suggest you stay away from it and ditch it. It's not really a comfortable thing to wear and mal lead to complications if improperly used. But if it's the rubberized one, that will do. I sugestv you buy the one with mesh so it can be breathable.