How to know if ankle is sprained or fractured? Swelling and blue skintone, not able to put much weight on it

Sprain or fracture? To help decide-
Was there a noise when it happened? A sprain may occur silently, or in severe cases there may be a popping sound. With a fracture, you might hear a crack.
Ankle misshapen? While swelling is a symptom of both injuries, if your ankle looks clearly “off,” it’s most likely because a bone is broken.
Does your ankle feel numb? Where is the pain?