Hemorrhoids are swollen veins in the lowest part of the rectum and anus. The walls of these blood vessels can stretch so thin that the veins bulge and get irritated, especially when you use the bathroom.
Hemorrhoids are the most common causes of rectal bleeding and are rarely dangerous. They can clear up after a couple of weeks.
Hemorrhoids can often get better on without surgery or inpatient procedures. If surgery is necessary a provider will typically use an injection to close off hemorrhoid or cauterize hemorrhoid.