Boo pins. Its hard to say without knowing your other circumstances. The burning and pain could be neuropathy, caused by the diabetes damaging your nerves. Or it could just be the effects of being overweight and stressing your legs and feet. I used to get terrible cramps in my legs too, quite at random and completely debilitating. Since diagnosis I have drastically reduced carbs, have lost a couple of stone (not sure exactly how much - 3 notches on my belt so far) and the cramps are virtually gone. Also, are you quite sedentary? I tend to find that sitting down for long periods at a computer gives me swelling in my feet/ankles, and pain and burning. And I sometimes get cramps after sitting down too long.