Piles, or haemorrhoids, are swollen veins in your rectum and anus. They can be internal, inside the rectum, or external, under the skin around the anus. Internal haemorrhoids often cause painless bleeding during bowel movements, while external haemorrhoids can be painful and may bleed. If a blood clot forms in an external haemorrhoid, it can become a thrombosed haemorrhoid, which is extremely painful and might need medical treatment.

Piles, also known as haemorrhoids, are a common condition where the veins around the rectum and anus become swollen and inflamed.