They are an annoying and sometimes painful problem. They may lead to a blood clot from a ruptured vein near the surface. Complications are unusual, but should be considered.
Constipation can lead to hemorrhoids.
This is mainly due to straining during bowel movements. Pregnancy and childbirth are also common causes. The first symptom may be bright red blood that is not mixed with stools. There may also be a mucus discharge and vague discomfort. A portion of the anal lining may become pushed out of the anus during defecation.