No pic. But tiny url? :) Someone probably reported it. If you are STD free, then I would not worry. Ask at your next regular Dr apt. That area stays warm and moist, so marks can remain for a very long time. Unless it is painful, do not worry. Itching is likely from dried sweat. Try some powder, or wear moisture wicking underwear, boxer briefs or briefs. Standard boxers and commando will not pull the sweat away from your body. Was the original blistering from chafing or some type of injury?