Haemorrhoids are swollen veins in the lower rectum or around the anus. They can be internal or external and commonly cause pain, itching, discomfort and occasional bleeding during bowel movements. Contributing factors include constipation, straining, pregnancy, a low-fibre diet and prolonged sitting. Many cases are mild and improve with self-care measures like dietary changes and topical treatments. However, persistent bleeding, severe pain, or a lump that doesn't resolve should prompt a consultation with a healthcare professional for assessment and possible further treatment.