At a glance
A strangulated hemorrhoid is an uncommon but urgent situation where a prolapsed internal hemorrhoid becomes trapped outside the anus, with its blood supply compressed by the sphincter muscle. The result is severe pain, progressive swelling, and risk of tissue death if not treated promptly.
This guide helps you recognise the signs and understand when to seek emergency care.
What happens
The sequence
- An internal hemorrhoid prolapses — tissue pushes out through the anus
- The sphincter muscle contracts around the base of the prolapsed tissue
- Blood can enter the hemorrhoid (through arteries) but cannot drain (veins are compressed)
- The tissue swells progressively
- The swelling increases the compression, creating a worsening cycle
- Blood supply becomes increasingly compromised
- Without intervention, the tissue can become ischaemic (deprived of oxygen) and potentially necrotic (tissue death)
Why it is different from a normal hemorrhoid flare
A normal hemorrhoid flare involves swelling, discomfort, and sometimes pain, but blood flow is maintained and the condition typically improves with conservative care. A strangulated hemorrhoid involves compromised blood supply — the tissue is being deprived of oxygen — which makes it an urgent situation.
How to recognise it
The key signs
- Prolapsed tissue that cannot be reduced — you cannot push the hemorrhoid back in, or it immediately re-prolapses
- Severe pain — significantly worse than a typical hemorrhoid flare, often constant and rapidly worsening
- Colour changes — the tissue progresses from pink or red to dark purple, blue, or black as blood supply is compromised
- Significant swelling — the tissue may become markedly swollen and tense
- Tenderness — even light touch is extremely painful
What it may look like
- One or more hemorrhoids protruding from the anus that will not go back in
- The protruding tissue may be darkened in colour
- Surrounding swelling that makes reduction impossible
- The person is typically in obvious distress from pain
Additional signs that increase urgency
- Fever — suggesting infection may be developing in the compromised tissue
- Inability to sit, stand, or find any comfortable position
- Rapidly progressive symptoms — getting significantly worse over hours
What to do
Seek urgent medical care
If you suspect a strangulated hemorrhoid, go to A&E or an urgent care facility. This is an appropriate reason for emergency attendance.
While waiting for care
- Do not force reduction — attempting to push strangulated tissue back in forcefully can cause further damage
- Ice — a cold compress wrapped in cloth may provide temporary pain relief and reduce swelling
- Lie down — lying on your side with knees drawn up can reduce pressure
- Pain relief — take whatever over-the-counter pain medication you have available
- Do not delay — strangulated hemorrhoids do not resolve on their own
How it is treated
In the emergency department
The medical team will assess the situation:
If the tissue appears viable (still receiving some blood flow):
- Pain management — adequate pain control is the first priority
- Attempt at manual reduction — with the sphincter relaxed under pain control or local anaesthetic, the hemorrhoid may be reduced
- If reduction is successful, monitoring and conservative management follow
- Close follow-up is arranged
If the tissue shows signs of necrosis or reduction fails:
- Emergency surgical intervention may be needed
- Emergency hemorrhoidectomy — removal of the strangulated and potentially necrotic tissue
- This is performed under anaesthesia
After treatment
- Pain management — the pain from a strangulated hemorrhoid episode can persist for days even after treatment
- Stool management — soft stools are critical to avoid re-injury
- Follow-up — to assess healing and discuss long-term management
- Discussion about preventing recurrence — surgical options may be considered to prevent future prolapse and strangulation
Prevention
The best prevention of strangulation is preventing significant prolapse:
- Manage hemorrhoids proactively — do not ignore worsening prolapse
- Discuss treatment options for recurring prolapse with your clinician
- Maintain stool management — soft stools reduce the straining that contributes to prolapse
- Respond to symptoms — if a prolapse is becoming harder to reduce, this is a signal to seek medical guidance before it becomes an emergency
The key message
A strangulated hemorrhoid is uncommon, but knowing the signs — irreducible prolapse, severe pain, colour change — helps you recognise when urgent care is needed. Prompt treatment prevents complications and provides relief. If you are unsure whether your situation is an emergency, err on the side of seeking assessment.