An Ulcer is an open sore on the skin or on a mucous membrane that results from the destruction of surface tissue. An ulcer may be shallow or deep and crater-shaped and is usually inflamed and painful. Skin ulcers most commonly occur on the leg as the result of inadequate blood supply . Ulcers on mucous membranes most commonly develp within the digestive tract, occurring in the mouth, or in the duodenum or in the large or small Intestines.The mucous membranes of the genitalia may also be involved...As for Culprit, this is a terminology that I use when describing what has caused a specific problem.....Hope this was helpful..
