I have no other problems just a bad knee for which I need to get replacement plus the swelling in it, otherwise I just have the burning and hurting sensations in my feet and ankles

Okay I am new to this group and just starting to learn so need some info. First off what is MAC? I do not have any infections just inflammation in the right leg/knee. My only real problems are the soreness/tingling and tightening in the bottom of my feet, and at night it gets worse and my ankles and about six inches up my leg are burning and sore. I do have minor arthritus in my right knee and hip--supposed to go for knee replacement but who knows when that will happen. I am just looking for something that would help to alleviate the burning sensations in my feet and leg. So far I am more or less walking okay, I am just very careful especially with the icy conditions out here right now.