I Have Polycystic Ovaries. Have Managed My Sugar Levels For

I have polycystic ovaries. Have managed my sugar levels for years but recently huge stresses have caused me to indulge in sodas, biscuits and crisps which I haven't had for over 3 years at least. I feel very down but found two scratches with burn blisters on them on my waist left side. What is this? Is it diabetes or just skin stress?