Medical Oncologist
CION Cancer Clinics
Cholangitis after biliary drainage | CION Cancer Clinics
Cholangitis is an infection of the bile ducts. After a stent or drain it happens when bile stops flowing again, usually because the stent has silted up or moved, and bacteria from the bowel climb into the pooled bile. Fever, shivering, pain under the right ribs or new confusion in someone with a stent means an emergency department the same day. This page explains why it happens, what is done in hospital, and what you can watch for at home. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MM
Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What is cholangitis, and why does it happen after a stent or drain?
- Why does the bile get infected?
- What happens in hospital when cholangitis is suspected?
- The words you will see, in plain language
- Four things families tell us, and what is actually true
- What you can do about the risk, and what this page cannot tell you
- Common questions about cholangitis after drainage
The short answer
What is cholangitis, and why does it happen after a stent or drain?
Cholangitis is an infection of the bile ducts. It happens after a stent or drain when bile stops flowing freely again, because bile that sits still grows bacteria, and those bacteria pass quickly into the blood. It is the most important thing to watch for in the months after biliary drainage, and it is treatable when it is caught early.
Why a stent makes it more likely, not less
A healthy bile duct is a closed, sterile system. A stent or a drain opens it to the bowel or to the outside world, so bacteria from the gut can now travel up into the liver. While bile is flowing well they are washed straight back out. The moment the stent silts up, shifts, or the tumour grows over its end, the bile pools and the infection starts.
What it feels like
Fever and shivering are the usual first signs, often with pain under the right ribs and a return of the yellow colour, dark urine or itching. In older people the first sign can simply be confusion or being unusually sleepy, with no fever at all. It can move to sepsis in hours, which is why the advice here is to act the same day.
This page is for people who already have a biliary stent, a drain through the skin, or a surgical bypass. If you are jaundiced and have none of these yet, see the drainage pages first.
!
A fever with a biliary stent or drain is an emergency
Fever, shivering or rigors, new pain under the right ribs, a return of the yellow colour, or new confusion in someone with a stent or drain: go to an emergency department the same day. Say the words "biliary stent" or "biliary drain" at the desk, because it changes how quickly you are seen. Do not give a fever tablet and wait to see if it settles.
Not sure whether this applies to you?
Ask an oncologistThe causes
Why does the bile get infected?
Almost always because something has stopped the bile moving. Finding which one is the first job in hospital.
The stent has silted up
Bile is thick, and over months it coats the inside of a plastic stent until it blocks. Metal stents last longer but tumour can grow into them. A blocked stent is the commonest cause.
The stent or drain has moved
A stent can slip down into the bowel or up into the duct. An external drain can pull out partly, kink, or get blocked with debris. Either way, the bile behind it pools.
Only part of the liver is draining
Where the block sits high, near where the ducts join, a single stent may drain one side of the liver and leave the other side full of stagnant bile. That undrained side can become infected even while the blood tests look better.
Soon after the procedure itself
Placing a stent or drain pushes on infected bile and can seed the blood. This is why antibiotics are given around the procedure and why a fever in the first day or two is taken seriously.
What to expect
What happens in hospital when cholangitis is suspected?
Blood tests and cultures
Blood is taken before any antibiotic is given, to measure liver function and infection markers and to grow the bacteria. This tells the team which antibiotic to switch to once results come back.
Antibiotics and fluids through a drip
These start within the first hour, before the cause is known. Most people feel the shivering settle within a day. Feeling better does not mean the block has cleared, only that the infection is being held.
A scan to find the block
An ultrasound or CT shows whether the ducts are swollen and where the stent sits. If you have an external drain, the team checks whether it is still draining and may flush it or inject dye through it.
Unblocking or replacing the drain
A silted plastic stent is exchanged through the endoscope. A blocked or displaced drain is repositioned or replaced under X-ray. If neither is possible, a new drain through the skin relieves the pressure. Antibiotics alone rarely settle cholangitis while the bile stays blocked.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
On the discharge summary
The words you will see, in plain language
- Cholangitis
- Infection of the bile ducts. "Ascending" cholangitis means bacteria have climbed up from the bowel, which is the usual route after a stent.
- Biliary sepsis
- The infection has spread from the ducts into the blood and is affecting the whole body. This is the stage that needs intensive treatment.
- Stent occlusion
- The stent has blocked. The usual fix is an exchange for a fresh one, or a metal stent if the first was plastic.
- Blood culture
- A sample of blood grown in the laboratory to identify the bacteria. It takes a few days, so antibiotics start before the answer is known.
- Cholangiogram
- An X-ray taken after dye is injected into the ducts, through the endoscope or through the drain, to show exactly where the block is.
Commonly believed
Four things families tell us, and what is actually true
"The fever came down with paracetamol, so it was just a viral fever."
Paracetamol lowers the temperature of any fever, including one from infected bile. In someone with a stent or drain, a fever that settles with a tablet has not been ruled out as cholangitis. It has been hidden. Go in anyway.
"The stent was put in last month, so it cannot have blocked already."
Plastic stents can block within weeks, especially where the bile is thick or the tumour sits close to the stent's end. Early blockage is not rare and is not anyone's fault. It is a reason to replace it.
"We will finish the antibiotics from the medical shop and see."
Tablets bought over the counter rarely reach the bacteria sitting in pooled bile, and they delay the one thing that works, which is getting the bile moving again. They can also mask the fever long enough for sepsis to set in.
"Getting cholangitis means the cancer treatment has failed."
It means the plumbing has blocked, not that the cancer has changed. Many people have an episode or two during a long course of treatment. Chemotherapy is paused while the infection is treated and restarted once the bile is flowing.
Being straight with you
What you can do about the risk, and what this page cannot tell you
You cannot prevent every episode, but you can catch every episode early. Keep a thermometer at home and check the temperature whenever the person feels cold, shivery or unusually sleepy. Watch the colour of the urine and the eyes. Keep the discharge summary in the bag by the door.
Who is at higher risk
People whose block sits high in the liver, whose stent is plastic rather than metal, who have had one episode already, or whose immune system is lowered by chemotherapy. If you are in one of those groups, ask the team whether the stent should be changed on a planned date rather than waiting for it to block.
What this page cannot tell you
It cannot tell you whether your stent should be plastic or metal, how often it should be exchanged, or whether a surgical bypass would suit you better than repeated stents. Those depend on the tumour, the scans and your fitness, and are questions for your treating team.
If chemotherapy is planned, tell the oncologist about every fever, even one that settled on its own. It changes how the next cycle is timed.Questions we are asked
Common questions about cholangitis after drainage
How quickly does cholangitis become dangerous?
It can move from a fever to sepsis within hours, particularly in someone who is elderly, diabetic or on chemotherapy. That is why the advice is same-day, not next-morning. Treated early, with antibiotics and a working drain, most episodes settle within days.
We live in a district town. What should we do at night?
Go to the nearest hospital that can give antibiotics through a drip and start there. Say the person has a bile duct stent or drain and show the discharge summary. Moving to the centre that placed the stent can follow once the infection is being treated.
Will the stent need to be replaced every time?
Usually, if it has blocked. A plastic stent is exchanged through the endoscope in a short procedure. If it keeps blocking, the team may switch to a metal stent, which stays open longer, or discuss a surgical bypass if you are fit for one.
Can cholangitis happen with an external drain too?
Yes. A drain that has stopped draining, kinked or pulled out partly lets bile pool behind it. Watch the volume in the bag: a sudden fall, or bile leaking around the skin site, along with a fever, means the drain is not working and needs checking the same day.
Does it affect chemotherapy?
Chemotherapy is normally paused until the infection has settled and the liver tests are improving, because the drugs are cleared by the liver and the immune system needs to recover. Tell the oncologist about every fever.
Is there anything to eat or avoid that lowers the risk?
No food causes or prevents cholangitis. Drinking enough water keeps the bile less thick, which may help a stent stay open, and eating well keeps strength up for the exchanges that may be needed. Beyond that, the risk sits with the plumbing, not the plate.
What if there is no fever, only confusion?
Treat it as cholangitis until proven otherwise. Older people and people on steroids often do not mount a fever, and new drowsiness, muddled speech or not recognising family can be the only sign. Go to an emergency department the same day.
Is a surgical bypass safer than repeated stents?
A bypass does not block the way a stent does, but it is an operation with its own recovery and risks, and it needs a person fit enough for it. Neither is right for everyone. Ask your team how they weighed the two in your case.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- NHS — Sepsis
- Cancer Research UK — Bile duct cancer: treatment
- National Cancer Institute — Bile Duct Cancer (Cholangiocarcinoma) Treatment (PDQ), patient version
- American Cancer Society — Palliative therapy for bile duct cancer
- NICE — Sepsis: recognition, diagnosis and early management (NG51)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Living With an External Biliary DrainDay-to-day care that keeps a drain workingSurgical Bypass vs Stent: How the Choice Is MadeWhy a bypass is sometimes chosen after repeated stent blocksJaundice Relief: How Fast and How CompleteWhat a working drain should do to the colour and the blood testsComplications and Red FlagsEvery same-day sign after cancer surgery, in one placeBiliary Bypass and Drainage SurgeryEvery page in this cluster, from stent to bypass
Talk to us
A stent in place and something has changed?
If there is a fever now, go to an emergency department first. For everything else, call the helpline or send us the discharge summary and a surgical oncologist will tell you what the next step is. One helpline serves every CION centre.