Medical Oncologist
CION Cancer Clinics
Sepsis after cancer surgery: the warning signs | CION Cancer Clinics
Sepsis is what happens when an infection sets off a reaction across the whole body, and it can follow any operation, including cancer surgery. The warning signs are a high or unusually low temperature, hard shivering, fast breathing, a racing pulse, new confusion, and passing very little urine. If you see them in the weeks after surgery, go to the nearest emergency department the same hour and say the person has just had cancer surgery. 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
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On this page
- What is sepsis, and why can it follow cancer surgery?
- What are the warning signs of sepsis after surgery?
- What happens when you reach the hospital?
- Words you may hear, in plain language
- Four things families tell us, and what is actually true
- Who is more at risk, and what can this page not tell you?
- Common questions about sepsis after cancer surgery
The short answer
What is sepsis, and why can it follow cancer surgery?
Sepsis is what happens when an infection sets off a reaction across the whole body, not only at the place where it started. The body's own response begins to damage its organs. It is an emergency, and it can follow any operation, including cancer surgery.
Where the infection usually starts
After surgery the usual starting points are the wound, the chest, the urine, a drip or drain site, or a join inside the body that has begun to leak. Any of these can stay a small local infection. Sepsis is the moment it stops being local. The pulse rises, breathing quickens, blood pressure falls and the person becomes confused or very drowsy.
Why the days after surgery matter more
A large operation leaves the body with less reserve to fight infection. Many people having cancer surgery have also had chemotherapy or radiotherapy in the months before, which lowers the immune response further. Poor appetite, diabetes and older age add to this. None of these mean sepsis will happen. They mean that if it does, it can move faster.
Sepsis is treated with antibiotics into a vein and fluids, and the outcome depends heavily on how early that begins.
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One thing that cannot wait
If someone who has had surgery in the last few weeks is shivering hard, breathing fast, confused or unusually sleepy, has cold or blotchy skin, or has passed almost no urine all day, do not wait to see how the night goes. Go to the nearest emergency department now and say they have recently had cancer surgery. Do not give paracetamol first and wait for the fever to settle. It hides the sign without treating the cause.
Not sure whether this applies to you?
Ask an oncologistWhat to watch for
What are the warning signs of sepsis after surgery?
No single sign proves sepsis. Two or more together, in someone who has just had an operation, are enough to act on.
Temperature and shivering
A temperature that is clearly raised, or one that has dropped unusually low. Hard shivering, sometimes called rigors, where the whole body shakes and the teeth chatter, even under a blanket.
Older people may have no fever at all.Breathing and heart
Breathing that is fast and shallow while resting, or a pulse that is racing when the person has not moved. Breathing like someone who has just climbed stairs, while lying still, is a sign.
Chest pain with breathlessness is its own emergency whatever the cause.Mind and speech
New confusion, slurred speech, not knowing where they are, or being so drowsy that they are hard to wake. Families often describe this as "he is not himself". Trust that instinct. It is one of the most reliable early signs.
Urine, skin and the wound
Passing very little urine over a whole day. Skin that is pale, cold, blotchy or has a rash that does not fade when pressed. A wound that has become hot, swollen, smelly or is leaking cloudy fluid.
What to expect
What happens when you reach the hospital?
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You are seen quickly
Say the words "recent cancer surgery" and "sepsis" at the desk. That moves the person to the front of the queue. Pulse, blood pressure, temperature, breathing and oxygen are checked straight away.
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Blood is taken before anything else
Blood tests show how the kidneys and other organs are coping. Samples are also sent to grow any bacteria, so the team can later match the antibiotic to the germ.
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Antibiotics and fluids into a vein
The aim is for the first dose of antibiotics to be running within the first hour of sepsis being suspected. Fluids go in at the same time to support the blood pressure. Nobody waits for the culture results before starting.
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Finding where it started
A chest X-ray, a urine test, a look at the wound and drain sites, and often a CT scan of the belly. A collection of pus or a leaking join may need to be drained through the skin, or the person may need to go back to theatre.
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Where you are looked after
Milder cases stay on the ward. If the blood pressure will not hold up or the breathing is struggling, care moves to a high-dependency bed or the ICU.
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In the emergency department
Words you may hear, in plain language
- Sepsis
- An infection that has triggered a whole-body reaction which is starting to harm the organs. It is a stage of infection, not a type of germ.
- Septic shock
- Sepsis where the blood pressure has fallen and does not come back up with fluids alone. It is the most serious form and is treated in intensive care.
- Blood cultures
- Blood samples placed in bottles to see whether bacteria grow. Results take a couple of days, which is why treatment starts before they are back.
- Source control
- Dealing with the place the infection is coming from. It may mean draining pus through the skin, removing a line, or a second operation.
Commonly believed
Four things families tell us, and what is actually true
"Fever after surgery is normal, so we gave a tablet and waited."
A mild rise in temperature on the first day or two is common and usually settles. A fever with shivering, fast breathing or confusion is different. Paracetamol lowers the number on the thermometer and changes nothing underneath. Call, do not wait.
"There is no fever, so it cannot be an infection."
Older people, and people who have had chemotherapy or steroids, often do not mount a fever even when seriously infected. A low temperature, confusion or a racing pulse can be the only signs.
"The wound looks clean, so it cannot be sepsis."
The wound is only one possible source. The chest, the urine, a drip site and a join inside the belly can all be infected while the skin looks perfect. Judge the person, not the dressing.
"A small local hospital will waste time. We should drive to the city."
The first hour matters more than the building. Any emergency department can start fluids and antibiotics and phone your surgical team. Go to the nearest one and let them arrange a transfer if needed.
Being straight with you
Who is more at risk, and what can this page not tell you?
Sepsis after cancer surgery is uncommon, but not rare enough to ignore. The risk is higher after long operations on the bowel, food pipe, pancreas or bladder, where the surgeon joins two ends of an organ and a leak is possible. It is also higher in people who are underweight, diabetic, on steroids, or who have had chemotherapy shortly before.
What lowers the risk
Much of it is done before you reach the theatre. Blood sugar is brought under control, smoking is stopped, nutrition is built up and any infection in the teeth, urine or chest is treated first. Afterwards, getting out of bed, breathing exercises and clean drains and lines all matter.
What this page cannot tell you
It cannot tell you whether the person in front of you has sepsis. Only a doctor who examines them and takes blood can do that. It cannot tell you your own risk, which depends on your operation, your health and your treatment so far. And it cannot replace the discharge sheet your surgeon gave you, which names the number to call and the exact temperature to act on. Keep a photo of it on your phone.
If you are unsure whether what you are seeing is serious, call the ward. Being told it is nothing is a good outcome, not a wasted call.Questions we are asked
Common questions about sepsis after cancer surgery
How soon after surgery can sepsis happen?
Most often in the first couple of weeks, when the wound, chest and any joins inside the body are still healing. It can happen in hospital or after you have gone home, so keep watching for the whole first month.
What temperature counts as a fever after surgery?
Your discharge sheet gives the exact reading to act on. But the number matters less than what comes with it. A slightly raised temperature in someone alert and eating is a different picture from a normal temperature in someone shivering, confused and breathing fast. Act on the whole picture.
Can sepsis happen if the wound looks fine?
Yes. A clean, dry wound rules out one source only. A chest infection, a urine infection, an infected drip site, or a leak from a join deep inside the belly can all lead to sepsis while the skin looks healthy. If the person is unwell, do not let a tidy dressing reassure you.
Should we go to the hospital where the surgery was done?
If it is close, yes, because the team knows the operation. If it is hours away, go to the nearest emergency department and tell them where the surgery was done. They can start treatment and speak to your surgeon by phone. The first hour matters more than the building.
Will sepsis delay my chemotherapy or radiotherapy?
Usually, yes. Treatment after surgery starts once you have recovered, and sepsis pushes that recovery back. Your oncologist will restart the plan when the infection has cleared and your blood tests and strength allow. A delay for this reason is expected.
How long does recovery from sepsis take?
Longer than the antibiotics. Many people feel weak, tired and low for weeks after leaving hospital, and some have poor sleep, poor concentration or muscle loss for longer. This has a name, post-sepsis syndrome. Tell your team about it. Physiotherapy, good food and patience all help.
Could the surgery have been done differently to avoid it?
Sometimes there was nothing to change, and sometimes there was. Ask the surgeon directly what they think the source was and whether anything about your case raised the risk. A good team will answer plainly. Our page on who is responsible if something goes wrong covers what you can ask.
Is treatment for sepsis covered by Aarogyasri or insurance?
Emergency treatment for a complication of approved cancer surgery is normally covered under Aarogyasri, CGHS, ECHS and EHS, and by most cashless insurers, though the rules vary. Ask the hospital's scheme desk on the day, keep every discharge summary, and call the helpline if you are stuck with paperwork.
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
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Addressed by landmark, because that is how this city navigates. A surgical consultation can be booked at any of these centres through one helpline, and your team will tell you where the operation itself takes place.
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Sources
- NHS — Sepsis
- NICE — Suspected sepsis: recognition, diagnosis and early management (NG51)
- National Cancer Institute — Infection and low white cell counts during cancer treatment
- Macmillan Cancer Support — Sepsis
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
Red flags after discharge: when to come back todayThe full list of signs that need same-day careFever after cancer surgeryWhen a temperature is ordinary and when it is notAnastomotic leak: what it is and why it mattersThe internal leak that most often leads to sepsis after bowel surgeryWho is responsible if something goes wrong?What you are entitled to ask after a complicationComplications and Red FlagsEvery complication page in one place
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Worried about someone who has just had surgery?
If the signs on this page are present, go to the nearest emergency department first. For anything less urgent, call the helpline and a CION team member will tell you what to do next. One helpline serves every CION centre.