I sprained my ankle about three months ago, i followed all instructions by my doctor. but a burning sensation has come back, but i didnt hurt it.

Ankle spain: How severe was the sprain? Residual swelling? Though you followed all advice, tissue may not be 100% and daily activities can exacerbate .. Burning may be a sign of that, nerve sensitivity post injury . Discuss PT and use of an ankle support with your doctor, as well as medication like NSAIDS or gabapentin. https://www.livestrong.com/article/124274-complications-after-ankle-sprain/