Nursing care
Dark purple or black stoma after surgery: why it is reported urgently
Written and reviewed by Dana Whitfield, RN, MSN · 4 min read · Updated October 2026
Short answer
A new stoma is expected to be moist, pink to red and somewhat swollen for several weeks. A stoma that turns dusky, dark purple, blue or black suggests its blood supply is failing, which can progress to necrosis. The nurse reports this urgently to the surgeon, documents the colour and extent, and continues close assessment rather than simply monitoring.
Separate expected swelling from a colour change
Swelling of a new stoma is expected after surgery and usually settles over the first six to eight weeks, which is why the appliance opening is re-measured as it shrinks. A healthy stoma looks moist and pinkish red, similar to the inside of the mouth. Swelling with a good colour is not, by itself, an emergency.
Colour is the deciding finding. A dusky, purple, blue-tinged or dark red stoma suggests reduced perfusion, and brown or black tissue suggests necrosis has already begun. The nurse's job is to recognise that the colour has crossed from expected to concerning, not to wait and see whether it pinks up.
First action: report urgently and describe what you see
Clinical guidance describes a dusky stoma as a possible emergency that needs urgent surgical review, because the surgeon must decide whether the blood supply is compromised. Notify the surgeon promptly, using a structured report that includes the time the change was noticed, the colour, and whether the whole stoma or only the edge is affected.
Necrosis limited to the surface may be managed conservatively, while deep ischaemia can extend below the skin and need further surgery. The nurse cannot tell the depth by looking, which is why this change is escalated rather than monitored. Follow any orders for imaging or bedside assessment of stoma viability.
Assess the client and the appliance while waiting
Check vital signs, abdominal pain, fever, and signs of sepsis or bleeding, and note whether the stoma is producing gas or output. Look for separation of the stoma from the skin. A clear pouch lets the stoma be seen without repeated removal, and the opening should not be so tight that it presses on the swollen stoma.
Document colour, size and moisture at each check so trends are visible to the next nurse and the surgical team. Hypotension or a low output state can worsen perfusion, so report those findings too. Avoid squeezing or rubbing the stoma, and keep the client and family informed in calm, plain language.
What can wait, what can be delegated and the distractors
Detailed teaching on pouch changes, diet and body image can wait until the stoma's viability is clear, although the client's worries deserve attention now. Assistive staff can empty the pouch and record output, but assessing stoma colour and deciding to escalate remain registered nurse responsibilities.
Tempting distractors include documenting the finding and rechecking at the next scheduled assessment, applying a warm compress, or changing to a larger pouch. Waiting delays surgical decision-making, local warming does not restore blood supply, and an appliance change treats the equipment rather than the circulation. Reporting comes first.
Reason through a hypothetical postoperative stoma
Imagine a hypothetical client on the second day after creation of a colostomy whose stoma was pink and swollen yesterday and now looks dark purple. The client has mild pain and a normal temperature. Options are to document and recheck in four hours, notify the surgeon now, remove the pouch to air the stoma, or reassure the client that swelling is normal.
Notifying the surgeon now is the strongest answer because a colour change toward purple suggests ischaemia that needs surgical assessment. Documenting alone delays care, removing the pouch does not help perfusion, and reassurance confuses swelling with colour. This original scenario is a study example, not a real exam item.
Sources and further reading
Australian Journal of General Practice: Care of patients with stomas in general practice (2018). Healthy stoma appearance and dusky stoma or necrosis as an early complication needing urgent surgical review.
Oxford University Hospitals NHS: Why check the size of your stoma?. Stoma swelling and size change during the first six to eight weeks after surgery.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our gastrointestinal practice questions are the closest set to what this page covers.
Common questions
Is a swollen new stoma normal?
Yes, some swelling is expected after surgery and usually reduces over several weeks. A swollen stoma that is moist and pink to red is generally expected; a dark, dusky or black one is not.
What colour should a healthy stoma be?
A healthy stoma is moist and pink to red, similar to the inside of the cheek. Pale, dusky, purple, blue, brown or black colouring should be reported to the surgical team.
Why can't the nurse simply monitor a dusky stoma?
The nurse cannot see how deep the loss of blood supply goes. Only surgical assessment can decide whether it is superficial or needs further surgery, so delay can allow necrosis to extend.