Top outside part of left foot stretching/burning sensation...?

Dr., recently I have experienced a strange sensation on the top part of my foot directly below my last two toes down further to the middle-left side on the top part of my foot. If I turn my ankle outwards (and foot inward) it feels like a muscle or something under my skin is stretching and almost moving in a way that I have never felt before. After the stretch/movement, I feel a slight burning sensation under my skin in that area. I am concerned because it definitely feels abnormal and the sensation is very slowly but surely getting stronger and longer in duration.

I run at least 3 times per week on an incline treadmill (it never hurts when I run), but I remember the first time I felt this was when my ankle turned outward when I was mowing the lawn one day; it didn't hurt my ankle at all but now I have these sensations. Could you please help me understand what this is? I don't want to cause further damage, but I am not sure what to do as I don't even know what I am dealing with. Thanks in advance!

Hi,
My first thought would be a tendonitis of the tendons that bring your toes upwards (that is why when you stretch the foot in the other direction, you get pain).
You may continue to have pain if you keep exercising as that only inflames the area. I do not know how long you have been experiencing this pain but if it is over two weeks and is not improving, I think a visit to a local podiatrist would be indicated.
Marc Mitnick DPM