Medical Oncologist
CION Cancer Clinics
Signs your surgical wound is infected | CION Cancer Clinics
An infected surgical wound usually gets worse after the first few days instead of better. The redness spreads, the pain grows, the skin feels hot, and cloudy or smelly fluid appears, sometimes with a fever. Some redness and swelling at first is normal. This page shows how to tell the two apart, when to call the team, and when to go to hospital the same day. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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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
- How can you tell if a surgical wound is infected?
- Which changes are normal, and which are warning signs?
- When does a wound infection usually show up?
- Who is more likely to get a wound infection?
- What do families often get wrong about wound infection?
- What happens when you report a possible infection?
- Common questions about wound infection after surgery
The short answer
How can you tell if a surgical wound is infected?
An infected wound usually gets worse after the first few days instead of better. The redness spreads, the pain grows, the skin feels hot, and cloudy or smelly fluid starts to come out, sometimes with a fever.
Why the first few days can fool you
Every new wound is a little red, a little swollen and sore. That is the body starting to heal, and it should settle a bit more each day. The pattern matters more than any single sign. A wound that looked calm at first and angry a few days later is telling you something. A wound that was pink at first and is paler now is healing.
What counts as a change worth reporting?
Look at the wound in good light once a day, at the same time. If you cannot see it yourself, ask the person caring for you to look. Compare it with yesterday. New spreading redness, new fluid, a bad smell, or pain that is climbing when it should be easing are all reasons to call the team the same day.
What this page cannot tell you
No list can say whether your own wound is infected. Only someone who looks at it, and sometimes tests the fluid, can say that. Use this page to decide when to call, not to decide that everything is fine.
Taking a photo each day in the same light makes it much easier to show the team what has changed.
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When not to wait for a clinic appointment
Go to the nearest emergency department the same day if the person has a fever with shivering, feels confused or unusually drowsy, is breathing fast, has a racing heartbeat, or the redness is spreading quickly across the skin. These can be signs that an infection has reached the blood. Take the discharge summary with you and say that they had cancer surgery recently. Do not start leftover antibiotics at home first.
Not sure whether this applies to you?
Ask an oncologistHealing or infection
Which changes are normal, and which are warning signs?
Most signs have a normal version and a worrying version. The difference is usually the direction they are moving in.
Redness
A thin pink line along the cut is normal. Redness that spreads outwards, darkens, or has an edge that moves further each day is not.
On darker skin, redness can look purple or brown. Warmth and tenderness are easier to judge.Fluid from the wound
A little clear or pale pink fluid in the first days is common. Thick, cloudy, yellow or green fluid, or anything with a bad smell, needs to be seen.
Pain and warmth
Soreness that eases a little each day is expected. Pain that returns or grows after it had settled, or skin that feels hot to the back of your hand, is a warning sign.
How you feel overall
Tiredness after surgery is normal. Fever, chills, sweats, loss of appetite that is getting worse, or simply feeling more unwell each day should be reported.
Also tell the team about
- A hard, tender lump under the wound
- Edges of the cut pulling apart
Timing
When does a wound infection usually show up?
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The first two or three days
Infection this early is uncommon. Redness, swelling and soreness now are usually the normal response to the operation. A fever in these first days more often comes from the chest or a drip site than the wound.
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Towards the end of the first week
This is when many wound infections begin to show. A lot of people are already home by now, so the family is often the first to notice. Keep looking every day even after discharge.
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The second and third week
Infection can still appear, especially in deep wounds, wounds in skin folds, or where a drain was removed. A leak of fluid after the stitches are out should also be reported.
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Weeks to months later
Rarely, an infection appears long after healing, usually around a mesh, an implant or a buried stitch. It can show as a sore lump or a small opening that keeps leaking.
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Higher risk
Who is more likely to get a wound infection?
Anyone can get one, including after a small operation done carefully. Some things make it more likely, and if any apply to you, look at the wound more closely.
Things about the person
Diabetes, especially when sugar levels run high, slows healing and weakens the body's defences. So do smoking and chewing tobacco, being very overweight, being underweight or poorly nourished, and taking steroids. Chemotherapy or radiotherapy given before the operation can also make the skin slower to heal.
Things about the operation
Long operations, operations on the bowel, and wounds in the groin or under a skin fold carry more risk. So do wounds that had a drain nearby or needed a second operation. None of this is anyone's fault, and your surgeon will already have taken it into account.
What you can do
Keep your sugar under control, stay off tobacco, eat enough protein, wash your hands before touching the dressing, and follow the dressing instructions you were given. Do not put oils, turmeric, powders or ointments on the wound unless the team suggested them.
Commonly believed
What do families often get wrong about wound infection?
"Pus means the wound is healing from inside."
Pus is a sign that the body is fighting an infection. It is not part of normal healing. Thick, cloudy or smelly fluid should always be shown to the team, even if the person feels well.
"We still have antibiotics from the hospital, so we will give those."
A leftover course may be the wrong medicine for this infection, and starting it can hide the signs the doctor needs to see. Call first. The team may want to take a swab before any antibiotic is chosen.
"Turmeric paste will keep the wound clean."
Pastes, oils and powders can trap moisture and dirt against an open wound. They also stain the skin, which makes redness harder to judge. Keep the wound as the team told you to.
"If there is no fever, it cannot be infected."
Many wound infections start without any fever, especially in older people and those on steroids or chemotherapy. Changes in the wound itself are enough reason to call.
If you call
What happens when you report a possible infection?
A look at the wound
A nurse or doctor removes the dressing, checks the skin around it, presses gently to see if fluid collects, and takes your temperature. A clear photo can help on a phone call, but it does not replace this.
Tests if needed
A swab of the fluid shows which germ is present and which antibiotic will work. A blood test may be done. An ultrasound can check for a pocket of pus under the skin.
Treatment
A mild infection is often treated with antibiotic tablets and closer dressing checks. If pus has collected, a few stitches may be opened to let it drain. This usually brings quick relief.
Follow-up
You will be told when to come back and what to watch for. An opened wound heals from the bottom up with regular dressings, which takes longer but usually heals well.
Questions we are asked
Common questions about wound infection after surgery
Is some redness around the stitches normal?
Yes. A narrow pink or red line along the cut is normal in the first days, and so is mild swelling. What matters is whether it is shrinking or spreading. Draw around the edge of the redness with a pen once a day. If the line keeps moving outwards, call the team.
The wound has a little clear fluid on the dressing. Is it infected?
Not usually. Small amounts of clear, straw-coloured or pale pink fluid are common in the first days. Change the dressing as advised. If the fluid becomes thick, cloudy, yellow or green, starts to smell, or keeps soaking through, show it to the team.
Can a wound get infected after I have gone home?
Yes, and many do. Infections often show towards the end of the first week, when people are usually home. Keep looking at the wound every day, and keep the discharge summary and the ward phone number where the family can find them.
My father is diabetic. Should we worry more?
His risk is higher, so look more carefully and report changes sooner. Keeping his sugar under control helps the wound more than any cream. Do not change his diabetes medicines on your own. If his readings run high after surgery, tell the doctor who treats his diabetes.
Will an infection mean another operation?
Most wound infections do not. Many settle with antibiotics and dressings. If pus has collected, the wound may be opened a little to drain it, often at the bedside. A deeper infection may need a procedure, and your team will explain why if that is the case.
Can we just clean it with Dettol or spirit at home?
Please do not unless the team told you to. Strong antiseptics can damage the new skin and slow healing. Most wounds need only gentle cleaning with clean water and a fresh dressing. Follow the written instructions you were given at discharge.
Will an infection delay chemotherapy or radiotherapy?
It can. Further treatment usually waits until the wound has healed well enough. This is one reason to report changes early, because a small infection treated quickly usually causes a shorter delay. Your oncologist will decide the timing with the surgeon.
Does an infection mean the surgery went wrong?
No. Wound infection is a known risk of any operation, even with careful technique and clean conditions. It says nothing about whether the cancer was removed properly. It is something to treat, and the sooner it is reported, the easier it usually is to settle.
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
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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
- NICE — Surgical site infections: prevention and treatment (NG125)
- NHS — Sepsis
- NHS — Cellulitis
- Cancer Research UK — Surgery for cancer
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
Looking After Your Surgical Wound at HomeDaily cleaning, dressings and what to keep off the woundWound Opening Up After SurgeryWhat to do if the edges of the cut pull apartOils, Turmeric and Home Remedies on a Surgical WoundWhy pastes and powders can do harmComplications and Red FlagsOther signs after surgery that need a doctor
Talk to us
Worried about a wound at home?
Call the helpline with the discharge summary in hand. We will help you decide whether it needs to be seen today and where. One helpline serves every CION centre.