An ulcer is a localized defect or erosion of the surface tissue of the skin or mucosa, often covered with pus, necrotic tissue, or crust, and healing leaves a scar. It may be caused by infection, trauma, or breakdown of nodules or tumors, and its size, shape, depth, and course of development may vary. It is often complicated by chronic infection and may fail to heal for a long time. Examples include gastric ulcer, duodenal ulcer, and chronic ulcer of the lower leg.
This section is being translated and completed.
This section is being translated and completed.
This section is being translated and completed.
This section is being translated and completed.
This section is being translated and completed.
This section is being translated and completed.
This section is being translated and completed.
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This information is for health education only and is not a diagnosis. Please consult a qualified clinician if you feel unwell.