Symptoms of anal bleeding during exercise may be due to the patient’s own presence of haemorrhoids, which cause friction during strenuous activity and rupture of the haemorrhoids causing bleeding. If you experience this condition, you should promptly visit a hospital anorectal unit for an examination to clarify the diagnosis. In the meantime, patients should take care to minimise the number of strenuous activities during treatment, maintain a light diet, avoid spicy and oily food, and pay attention to personal hygiene in daily life.