At a glance
Waking up from fistula or abscess surgery to find something still in place can be surprising. Many people are told a drain or a seton has been left where the tunnel or cavity is. Both do a similar job: they keep a small channel open so fluid can escape rather than build up inside.
This page explains, in plain language, what these devices are, why a surgeon might use one, and what living with one can involve day to day. It does not replace the specific instructions your surgical team gives you. Those always come first.
Why something gets left in place
A fistula is a small tunnel, and an abscess is a pocket that has filled with infected fluid. If the skin closes over the top before the inside has settled, fluid can gather again and form another abscess. Leaving a channel open lets that fluid drain steadily instead.
So rather than closing everything at once, a surgeon may keep the area draining on purpose. It can feel counterintuitive, but an open, draining channel is often part of letting the deeper tissue calm down and heal in the right order — from the inside outward.
What a surgical drain is
A surgical drain is usually a soft tube or a flexible strip placed into a cavity, with a small part sitting outside the skin. Its job is to give fluid a clear route out. Drains left after abscess surgery are often temporary and removed once the discharge has settled, which your team will decide.
Some drains are longer than people expect, which can be startling to see or feel. The length reflects the depth of the cavity being drained, not the severity of anything. Your surgeon can explain what was placed and roughly how long it is likely to stay.
What a seton is
A seton is a thin thread or soft loop passed through the fistula tunnel and tied so it stays in place. In broad terms there are two purposes:
- A draining seton keeps the tunnel open so it discharges steadily and any infection settles. It may stay for weeks or longer.
- A cutting seton is tightened over time so it works gradually through the tissue, aiming to let the tunnel heal behind it while protecting muscle function.
Which type is used, and for how long, depends on the fistula’s path relative to the muscles around the anus. Our guide on the difference between cutting and draining setons covers this in more detail.
Living with one day to day
Experiences vary a lot between people and procedures, but common themes people describe include:
- Keeping the area clean and dry. Gentle cleaning after bowel movements, following your team’s advice, helps the surrounding skin stay comfortable.
- Managing drainage. A pad or gauze can catch discharge and protect clothing and skin. Ongoing drainage is often expected while a channel is open.
- Comfort with sitting and movement. Some people feel a seton as a slight tugging or awareness rather than sharp pain. A cushion can help with sitting.
- Clothing. Loose, breathable clothing tends to reduce friction and trapped moisture.
- Activity. Many people gradually return to everyday routines. What is safe, and when, is best guided by your own surgical team.
If drainage, comfort, or hygiene feels hard to manage, it is worth raising at your follow-up rather than waiting.
Questions worth asking your team
- Was a drain or a seton placed, and which type?
- How long is it likely to stay, and what happens when it comes out?
- What level of drainage is expected, and what would count as too much?
- How should I clean and care for the area?
- What activities should I avoid for now?
When to seek care
Some drainage and discomfort is often expected while a drain or seton is in place. But certain changes are worth getting checked promptly.
Seek medical care if you notice any of the safety signs listed for this condition, and contact your surgical team or seek urgent care for severe pain, heavy bleeding, a high fever, or any symptoms that are getting worse rather than better. If something feels wrong, it is always reasonable to ask.