How is a high ankle sprain treated?

It Depends: There are differing opinions with this subject. But a high ankle sprain needs to be immobilized, usually in a boot, sometimes walking and others using crutches to start with. The recovery time is usually longer than a standard ankle sprain. On occasion if there is a major tear of the ligament, surgery can be needed to fix it.

5 stages of treatment: High ankle sprains are much less common but are more disabling than your traditional lower ankle sprain Treatment is carried out in stages 1 - Injury Protection: Pain Relief & Anti-inflammatory 2: Regain Full Range of Motion 3: Restore Muscle Strength 4: Normalise Foot Biomechanics 5: Restore High Speed, Power, and Agility http://physioworks.com.au/injuries-conditions-1/high-ankle-sprain

Depends on how long: The high ankle sprain can be a signficant injury, sometimes requiring prolonged protection, physical therapy, or even surgery to get the best results. If one happened in the distant past and you are doing well now, I wouldn't worry about it. If it happened more recently (in the last few weeks) or if you are having continued problems with it (swelling, pain, loss function), then you need be seen