What is an "ulcer"?

An ulcer is defined as a break in the skin or a mucous membrane that fails to heal properly. This condition often results from various factors, including infection, inflammation, or inadequate blood flow, leading to the breakdown of tissue. Ulcers can occur in different parts of the body, commonly in the digestive tract as peptic ulcers or on the skin due to pressure or irritation.

Understanding that an ulcer indicates a persistent wound or sore is critical, as it distinguishes it from other conditions associated with rapid healing or organ function. For instance, bacteria primarily cause infections but do not define an ulcer itself. Similarly, skin growths that heal quickly and internal organ malfunctions relate to different medical issues and do not capture the defining characteristic of an ulcer as a non-healing break in the skin or mucosa.