My husband is 45, very healthy (5' 11", appx 160 lbs), has recently (the last 2 months) developed hives and facial edema in response to high stress. Last night developed a large (diameter appx 1.5-2 inch) hard, painful lump behind his right ear (over temporal bone, NOT mastoid). Has another, smaller lump (appx .5 inch) at hairline below larger lump. Wondering what the possibilities are.