http://www.emedicine.com/emerg/topic88.htm
Here is another site describing cellulitis.
"Cellulitis is most common on the face and lower legs, although skin on other areas of the body may sometimes be involved."
http://www.nlm.nih.gov/medlineplus/ency/article/000855.htm
"Heart disease patients often exhibit dermatologic changes. Sometimes these skin changes are of paramount importance in making a diagnosis of the underlying cardiac disease."
http://www.emedicine.com/derm/topic548.htm