Ankle sprains are quite common and if treated early on can be resolved rather quickly. If left untreated, it is not uncommon for it to become a chronic issue with recurrent sprains and instability.
There are two types of ankle sprains inversion and eversion with inversion being the most common (rolling the ankle outwards and the inside of the foot turning up).
The inversion sprain typically involves the Talus bone being displaced as a result of the ligaments that are retaining it are torn and the bone gives way moving in an anterior and superior plane out of the anatomical ankle mortise. The results are a displaced bone and injured ligaments healing with scar tissue in a stretched / lax state, hence the future instability.
I have developed a protocol over the past 28 years to correct this issue involving manipulation of the joint, ultrasound, electric muscle stimulation, specific supplements to promote better healing, a specific orthotic for support and the use of Kinesiotape to reduce swelling and provide stability in the healing process.
What follows is a pair of pictures the first is less than an hour after the inversion sprain and the next is less than 24 hours later...as you can see the results are quite profound....