Abdominal pain vs blood in stool

Abdominal pain is belly discomfort, whereas blood in stool is visible bleeding from the digestive tract or around the anus.

Pain may be localised or widespread and may come with nausea, bowel changes, urinary symptoms, or fever. Blood can appear bright red on paper or in the bowl, mixed with stool, or as black tarry stool. The colour, amount, and whether bleeding is repeated are important details.

Start with abdominal pain when discomfort is the leading issue and no blood has been seen. Explain where it is felt, whether it travels, how it began, and whether food, movement, urination, or passing stool affects it. A clinician also needs to know about vomiting, fever, pregnancy, medicines, and prior abdominal surgery.

Pain that becomes severe, persistent, or markedly different from your usual symptoms needs timely assessment even if bleeding is absent.

Visible blood should be treated as the main concern even when there is little discomfort. Avoid assuming it comes from a minor cause. Tell a clinician whether blood is on toilet paper, coating the stool, mixed through it, or making the stool black and tarry, and report any recent change in bowel habit.

Medicines that affect bleeding, including anticoagulants, are particularly relevant and should be mentioned when seeking advice.

Seek urgent medical help for heavy bleeding, black tarry stool, fainting, severe weakness, confusion, severe or worsening abdominal pain, repeated vomiting, a swollen rigid abdomen, or blood with signs of shock. These symptoms can indicate significant blood loss or another urgent digestive problem.

Do not delay assessment for new bleeding during pregnancy or for bleeding accompanied by fever and worsening pain.

If the main problem is diarrhoea, constipation, vomiting, heartburn, pain while passing urine, or vaginal bleeding, lead with that symptom. Blood that is clearly from the urine or vagina needs a different assessment from blood seen with stool.

If the source is uncertain, do not try to determine it by yourself. Describe exactly what you noticed and seek clinical advice.

Assessment starts with the bleeding pattern, pain location, bowel habit, medicines, family history, recent illness, and other symptoms. Depending on the situation, examination may include checking the abdomen and an examination of the area around the anus or rectum.

Tests may include blood tests, stool testing, imaging, or an endoscopic examination. The choice is guided by the full history and examination, not by one symptom alone.