What are haemorrhoids? What are haemorrhoids? Haemorrhoids (also spelt hemorrhoids), or 'piles', are lumps that occur inside and around the anus (back passage). They are very common. Haemorrhoids are sometimes described as ‘varicose veins’ of the anus. They happen when there is a weakness in the side of the anal canal that leads to thickening of the lining and then veins can enlarge to become a haemorrhoid, causing symptoms such as bleeding, pain and discomfort. Haemorrhoids may be just inside (internal haemorrhoid) or outside (external haemorrhoid) the anus. Large internal haemorrhoids may protrude outside the anus (prolapse). What are the symptoms of haemorrhoids? If you have haemorrhoids you may notice bright red blood on the toilet paper or in the toilet when you have a bowel motion (poo). There may be some itchiness, discomfort or pain around the anus. Sometimes there can be a noticeable lump that protrudes out of the anus. Many people experience no symptoms or very mild s...