Internal haemorrhoids do not usually cause abdominal pain, they usually bleed intermittently and are usually triggered by constipation, eating spicy and irritating foods etc. If blood in the stool is accompanied by symptoms such as abdominal pain and discomfort, mucopurulent stools or bowel habits, it is advisable to seek prompt medical attention and, if necessary, complete a colonoscopy to clarify the presence of lesions such as intestinal tumours.