Piles are swollen and inflamed veins in the rectum and anus that cause discomfort and bleeding. They are usually caused by straining during bowel movements, obesity or pregnancy.
Discomfort is a common symptom, especially during bowel movements or when sitting. Other symptoms include itching and bleeding.
They can have a range of sizes, and they may be internal or external. Internal piles are normally located between 2 and 4 centimeters (cm) above the opening of the anus, and they are the more common type. External piles occur on the outside edge of the anus.
Medical procedures to remove the haemorrhoid are often needed to provide relief.