I saw a post earlier that made me decide that maybe it wasn't stupid after all to ask this. I have these..... I'm not sure what to call them.... they look kinda like a boil i guess, that come up in tender spots. They are just raised red skin at first then they turn purple and hurt like he**. When they bust the drainage is what looks like infection and old blood, and when it finely heals usually leaves behind a purple scar. Dose any one else have this problem? Is it CKD related or should i have it checked out? Thanks for any info.