I keep getting recurring cysts on my pubis. Why there I don't know, as I'm very clean. Anitibiotics seem to reduce the size but doesnt completely go away, now another popped up in a day, it feels huge, it's purple and the pain radiates. I've been a diabetic for about 7 years, even though I still have quite a bit of sugar my bloods are always ok. Is this a common thing?