burning sensation in the foot.

Beats me Andy

Is it generally only at night you feel it?

Sounds a bit like a mild gout. Have you had a blood check for gout?

Hi Andy, I had something similar happen to me last year. At night and in my thighs and down the side of my legs. I mentioned this to my nurse who asked a doctor and he said that it was my blood sugar normalising. Are you going through a period of better blood sugar control from an erratic period of control?
Mine disappeared soon enough, so I wouldn't worry about it. But definitely mention it to your nurse as it should be something that should be monitored.