My husband and I have been doing an excessive amount of walking the past 3 days, as we are on vacation in Washington, DC. After the first day, he developed a dark red, blotchy rash on the inside of his lower legs. (ankle to 2/3 up the calf) It is smooth, not raised, does not hurt or itch. But it seems to be getting darker in color and is filling in. Is this something serious- related to the excessive walking? He s taken several doses of Benedryl and is using Corizone cream, to no avail. Any ideas? Thanks- Julie C.