What is an inversion ankle sprain?

Understanding Inversion Ankle Sprain

An inversion ankle sprain means you have injured one or more of the three main ligaments on the outside of your ankle; the anterior talofibular ligament (ATFL), the posterior talofibular ligament (PTFL) and the calcaneofibular ligament (CFL).

Answer:

An Inversion ankle sprain is when you have injured one or more of the "three main ligaments on the outside of your ankle".

Explanation:

This sprain will usually heal within 1-4 weeks at the max, unless you did a number on it, then you could be out for 3-6 months. Hope this helps!