Bloody stools

Overview

Bloody stools means seeing blood in your bowel movements. The blood can be bright red, dark red, or black, depending on where it comes from in the digestive tract. It can be a sign of a minor issue or something more serious, so it's always important to see a doctor.

Yes, bloody stools are a common symptom that many people experience at some point in their lives. It is a frequent reason for visiting a doctor.

It can affect people of all ages, but certain causes are more common in specific age groups. For example, hemorrhoids are common in adults, while anal fissures often occur in children.

Symptoms

Common symptoms

• Bright red blood on toilet paper or in the toilet bowl
• Dark red or maroon blood mixed with stool
• Black, tarry stools (like coffee grounds)
• Abdominal pain or cramping
• Changes in bowel habits (diarrhea, constipation, or urgency)

Symptoms in children

• Small amounts of bright red blood from an anal fissure (often due to constipation)
• Bleeding from infections or a Meckel's diverticulum (a birth defect)
• Dark blood may be a sign of a more serious condition

Symptoms in older adults

• Bleeding from diverticulosis (small pouches in the colon)
• Colorectal polyps or cancer
• Bleeding from medications like blood thinners

Causes

Main causes

• Hemorrhoids (swollen veins in the rectum or anus)
• Anal fissures (small tears in the lining of the anus)
• Diverticulosis (small pouches that form in the colon wall)
• Inflammatory bowel disease (such as Crohn's disease or ulcerative colitis)
• Colorectal polyps or cancer
• Stomach ulcers (peptic ulcers)
• Infections of the bowel (like bacterial dysentery)

Risk factors

• Being over age 50
• Family history of colorectal cancer or polyps
• History of polyps or chronic inflammatory bowel disease
• Chronic constipation or straining
• Heavy alcohol use or smoking
• A diet low in fiber and high in processed foods

When to see a doctor

See a doctor urgently if:

• Any black, tarry stool
• Heavy bleeding that soaks several toilet papers or fills the bowl
• Symptoms of anemia (feeling very pale, tired, or short of breath)
• Severe abdominal pain that does not improve
• If you are on blood thinners and notice any bleeding

Book a routine appointment if:

• Small streaks of bright red blood that appear occasionally and disappear on their own
• If you have known hemorrhoids and the bleeding is mild and expected

Diagnosis

A doctor will start by asking about your symptoms, medical history, and any medications you take. They will usually perform a physical exam, which may include a digital rectal exam to check the lower rectum.

Tests that may be done

• Stool tests (to check for hidden blood or infection)
• Blood tests (to check for anemia or signs of infection)
• Sigmoidoscopy (a flexible tube with a camera to view the lower colon)
• Colonoscopy (a camera to examine the entire colon)
• CT scan or other imaging if needed

What to expect at your appointment

If a colonoscopy is recommended, you will need to follow a special diet and use a bowel preparation drink to clear your colon. The procedure is done under sedation and is usually not painful. It allows the doctor to see the source of bleeding and sometimes treat it right away.

Treatment

Treatment depends on what is causing the bleeding. Many causes are mild and do not require any specific treatment. Others may need medication, procedures, or sometimes surgery.

Self-care at home

• For hemorrhoids or fissures: increase fiber (fruits, vegetables, whole grains) and drink plenty of water
• Avoid straining during bowel movements
• Take warm baths (sitz baths) to soothe the area
• Use over-the-counter creams or ointments as recommended by your pharmacist

Medical treatments

Doctors may prescribe antibiotics for infections, acid-reducing medications for stomach ulcers, or anti-inflammatory drugs for inflammatory bowel disease. During a colonoscopy, small procedures like banding hemorrhoids or removing polyps can be done. If you become anemic, you may be given iron supplements.

When is surgery considered?

Surgery is rarely needed. It may be considered for severe, uncontrolled bleeding (from diverticulosis or large polyps) or for certain types of cancer. Emergency surgery is an option if bleeding cannot be stopped by other means.

Living with this condition

If you have a chronic condition like inflammatory bowel disease, you may need to take medication regularly and see your doctor for check-ups. Keep a diary of your symptoms and any changes in your bowel habits. Most people can manage well with lifestyle adjustments.

Lifestyle tips

• Eat a high-fiber diet with plenty of fruits, vegetables, legumes, and whole grains
• Drink enough water to keep stools soft
• Exercise regularly to help bowel function
• Avoid smoking and limit alcohol

Diet and exercise

A diet rich in fiber helps prevent constipation and straining. Aim for at least 25 to 30 grams of fiber per day. Gentle activities like walking or swimming can improve blood flow and digestion.

Mental health and emotional wellbeing

Seeing blood in your stool can be frightening and cause anxiety about a serious illness. It is normal to feel worried. Talk to your doctor about your fears. If anxiety persists, consider speaking with a mental health professional. If you are having thoughts of self-harm, reach out for crisis support immediately.

Prevention

Not all causes of bloody stools can be prevented, but a healthy lifestyle can lower your risk for many conditions. Eating a high-fiber diet, staying hydrated, avoiding smoking and excessive alcohol, and staying active can help.

Screening programmes

Regular screening for colorectal cancer is recommended starting at age 50 (or earlier if you have risk factors). This can involve a simple stool test to check for hidden blood, or a colonoscopy. Early detection can prevent serious problems.

Complications

If left untreated

• Iron deficiency anemia from chronic blood loss, leading to tiredness, pale skin, and shortness of breath
• Severe bleeding that can cause shock and require emergency treatment
• If the cause is colorectal cancer, delaying treatment can allow the cancer to grow and spread

Long-term outlook

For most people, bloody stools are caused by a benign condition that can be treated easily. Even with more serious causes like colon cancer, early detection and treatment offer a very good chance of recovery. Following your doctor's advice and attending regular check-ups will give you the best possible outcome.

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