I had acute kidney failure a couple months ago due to severe dehydration. Function was restore over-night and all was back to normal. Scans and tests showed a month later I had a 100% recovery. I showed large bruising (at the time of hospitalization) around the area of one kidney which I told was normal. I have changed my diet and excersice a lot (lost 25+ lbs). I have lost a lot of weight, stopped drinking alcohol and caffeine and dropped ~30 lbs. I noticed today that faint marks still show from the bruising (they look very faint). Note: I lost a lot of back fat, my body fat is 11% now. I don t see my Dr. for a while. I feel great and am well hydrated and have no symptoms. Does it take this long for the bruising to go away? Could the extreme weight lose reveal bruising that hasn t quit gone away yet?