Which anatomical structure is affected by hemorrhoids?

Hemorrhoids specifically affect the veins in the rectal area. They are swollen and inflamed blood vessels that can occur either internally or externally around the anus. The condition arises when there is increased pressure in the lower rectum, often due to factors such as straining during bowel movements, extended periods of sitting, or conditions that cause chronic constipation or diarrhea.

The swelling occurs when the blood vessels become engorged with blood and lose their elasticity. This is distinctly related to the venous system, as it is the veins that are involved in the accumulation and pressure of blood leading to the symptoms associated with hemorrhoids, such as discomfort, pain, and bleeding.

Understanding that hemorrhoids are a vascular issue helps to clarify their nature and the reasons behind their uncomfortable symptoms, which are not directly linked to arteries, nerves, or muscles.