Hi John Thanks for you reply. I have had a few scans so any injury has been ruled out, I also had blood tests done about a year ago and they came back clear so I take it this has ruled out any medical conditions like diabetes, heart trouble, kidney or liver problems. Its not causing any pain, its just very unsightly and only appeared about 1 year ago. I'm not overweight and 27. Its only the left ankle, sometimes knee and back of calf if it gets bad. Its a strange one, maybe something I'll just have to get used to. Thanks again.