Constipation Danger Signs: When Is Constipation Serious?

Constipation danger signs to watch for

You should speak to a healthcare professional if constipation occurs alongside:

1. Blood in your stool
   Bright red blood, dark stools, or black, tar-like stools should always be assessed.
2. Severe or persistent abdominal pain
   Ongoing or intense stomach pain is not typical of simple constipation.
3. Vomiting
   Constipation combined with vomiting may indicate a blockage and requires urgent medical attention.
4. Unexplained weight loss
   Losing weight without trying should be discussed with a doctor.
5. A sudden change in bowel habits
   A new and unexplained change — especially in adults over 50 — should be checked.
6. Symptoms lasting more than 2–3 weeks
   If constipation continues despite lifestyle adjustments, medical advice is recommended.
7. Iron deficiency anaemia
   If diagnosed with unexplained anaemia alongside constipation, further assessment may be needed.

When is constipation an emergency

Seek urgent medical help if constipation is accompanied by:

• Severe abdominal swelling
• Inability to pass gas
• Persistent vomiting
• Fever with abdominal pain

These symptoms require immediate evaluation.

When is constipation usually not serious

Constipation is common and often linked to:

• Low fibre intake
• Not drinking enough fluids
• Changes in routine or travel
• Reduced physical activity
• Certain medications

In many cases, symptoms improve with time and simple adjustments like increasing prebiotic foods. You can read more about fibre and constipation in our blog here.

Final thoughts

Constipation is rarely dangerous on its own, but knowing the constipation warning signs can help you recognise when medical advice is needed.

If symptoms feel unusual for you, are persistent, or include any of the danger signs listed above, speaking to a healthcare professional is the safest step.