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Fever with a removed spleen: go to hospital the same day | CION Cancer Clinics
If your spleen has been removed or does not work, any fever is an emergency. Go to the nearest emergency department or call 108 the same day, even at night. Without a spleen, some bacteria can spread through the blood within hours. Tell the staff you have no spleen so antibiotics start quickly. Follow any emergency antibiotic plan your doctor gave you, and still go. At CION Cancer Clinics, our haematology team supports patients and families through treatment, cost questions and life at home.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- Why is a fever an emergency after splenectomy?
- Who counts as having no working spleen?
- What should you do when the fever starts?
- How is a fever handled differently without a spleen?
- What do families often believe about fever without a spleen?
- How can you lower the risk, and what can this page not tell you?
- Common questions about fever after splenectomy
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Fever without a spleen: go to hospital now
If your spleen has been removed, or does not work, treat any fever, shivering or sudden feeling of being very unwell as an emergency. Call 108 or go to the nearest emergency department straight away, even at night. Tell the triage staff "I have no spleen". If your team gave you an emergency supply of antibiotics with written instructions, follow those instructions, and still go to hospital.
The short answer
Why is a fever an emergency after splenectomy?
Without a spleen, some bacteria can spread through the blood very fast. A fever that looks ordinary in the morning can become a life-threatening blood infection by the evening, so it needs hospital care the same day, not a wait-and-see approach.
What the spleen does
The spleen sits under the ribs on the left side. It filters the blood and helps the body fight certain germs, especially bacteria wrapped in a protective coat, such as pneumococcus. When the spleen is removed, which doctors call splenectomy, the rest of the immune system still works, but it is slower against these particular germs.
The infection doctors worry about
The serious form is called overwhelming post-splenectomy infection, or OPSI. It is uncommon, but when it happens it moves quickly. It can start like flu, with fever, aches, vomiting or loose stools, and then turn into sepsis, where the infection starts to damage the organs.
The risk does not wear off
The risk is higher in the first years after the operation and in children, but it lasts for life. People who had their spleen removed long ago are sometimes the ones who forget to act on a fever.
Signs that it is turning into sepsis
Watch for confusion or unusual sleepiness, fast breathing, a racing heart, cold or mottled skin, very little urine, or a rash that does not fade when you press a glass against it. Any one of these means call 108 rather than making your own way to hospital. Families often notice the change before the patient does.
Not sure whether this applies to you?
Ask an oncologistDoes this include you?
Who counts as having no working spleen?
This advice is not only for people who had an operation. A spleen can stop working while it is still in the body.
Spleen removed by surgery
For an injury, for a low platelet condition called ITP, for thalassaemia, or as part of treatment for a lymphoma or another blood condition.
Sickle cell disease
Repeated damage in childhood often leaves the spleen scarred and not working, even though it is still there. Children with sickle cell disease need the same fever rule, and many are given preventive antibiotics and extra vaccines by their doctor.
A spleen that works poorly
Radiation to the spleen area, some bowel and liver conditions, and some treatments for blood cancers can weaken how the spleen works.
If you are not sure, ask your haematologist whether this applies to you.Low immunity as well
If you are also having chemotherapy, or have a low white cell count, a fever is even more urgent. Your team may already have given you a separate fever plan.
Step by step
What should you do when the fever starts?
Check, but do not wait
Take the temperature if you have a thermometer. Shivering, feeling suddenly very weak, or cold hands with a racing heart count too, even with a normal reading.
Follow your written plan
If your doctor gave you an emergency antibiotic supply and told you when to use it, follow that exactly. Do not borrow tablets or buy them from a chemist without a plan.
Go to the emergency department
Choose a hospital with a round-the-clock emergency department. Call 108 if the person is drowsy, confused, breathless or has a spreading rash.
Say it at triage
Say "no spleen" first. Show your discharge summary or emergency card, and mention any chemotherapy or blood condition. This helps the team start antibiotics quickly, often before test results are back.
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Side by side
How is a fever handled differently without a spleen?
Most people
Without a working spleen
A mild fever can often be watched at home for a while
Any fever is checked by a doctor the same day
Paracetamol and rest are often enough
Paracetamol can hide the fever; it does not replace hospital
Antibiotics only if a doctor finds a bacterial cause
Antibiotics are usually started early, before test results
A dog bite is cleaned and watched
A dog or cat bite needs a doctor promptly
Commonly believed
What do families often believe about fever without a spleen?
"The operation was years ago, so the risk is gone."
The risk is highest soon after surgery, but it lasts for life. Serious infections have been reported decades later. The fever rule never expires.
"It is only viral fever, everyone at home has it."
It may well be viral. But the early hours of a serious bacterial infection look the same, and without a spleen you cannot afford to guess. Let a doctor examine you and decide.
"She had all her vaccines, so she is protected."
Vaccines lower the risk a great deal, and keeping them up to date matters. They do not cover every germ, so a fever still needs hospital care.
"We will give paracetamol and see how he is in the morning."
Paracetamol may bring the temperature down while the infection keeps spreading. Night-time is when families most often wait. Go the same night.
Living without a spleen
How can you lower the risk, and what can this page not tell you?
You cannot remove the risk, but you can make it much smaller. Most of it comes down to vaccines, a plan agreed with your doctor, and people around you who know what to do.
Vaccines to ask about
Ask your doctor about vaccines against pneumococcus, meningococcus and Haemophilus influenzae type b, and a flu vaccine every year. Some need booster doses. Keep a record of what you have had and when.
Travel, malaria and bites
Malaria can be more severe without a spleen. Use mosquito nets and repellent, and get any fever after travel checked the same day. Animal bites, including from a pet, need a doctor promptly.
Carry proof
Keep an emergency card or a phone note that says you have no spleen, and tell your dentist, school and employer. If a haematologist looks after your blood condition, ask whether you should keep antibiotics at home and exactly when to use them.
What this page cannot tell you
It cannot tell you whether today's fever is serious, which antibiotic suits you, or which vaccines you still need. Your own doctor has to decide those, based on your history and tests.
Questions we are asked
Common questions about fever after splenectomy
My mother had her spleen removed and now has a fever at night. Can we wait till morning?
No. Take her to the nearest emergency department tonight, or call 108 if she is drowsy, confused or breathless. Serious infections without a spleen can worsen within hours. Carry her discharge summary and tell the staff she has no spleen, so antibiotics are started without delay.
What temperature counts as a fever without a spleen?
Do not wait for a particular number. Any raised temperature, shivering, or feeling suddenly and unusually unwell should be treated as urgent. Some people with a serious infection feel very ill before the thermometer shows much. Ask your own doctor whether they want you to use a specific reading.
Should I keep antibiotics at home?
Many doctors advise people without a spleen to keep an emergency supply, with clear written instructions on when to take it. This is a decision for your doctor, not something to arrange from a chemist. Even if you take the emergency supply, you still need to go to hospital.
Which vaccines do I need after spleen removal?
Usually vaccines against pneumococcus, meningococcus and Haemophilus influenzae type b, plus a yearly flu vaccine. The timing and boosters depend on your age, your condition and what you have had before. Ask the doctor who looks after your blood condition to check your record and plan the rest.
My child has sickle cell disease. Does this apply?
Yes. In sickle cell disease the spleen is often damaged early in life and stops protecting against infection, even though it is not removed. A fever in a child with sickle cell disease needs hospital care the same day. Ask your child's doctor about vaccines and any preventive antibiotics.
What will the hospital do?
Expect blood tests, including blood cultures, which look for bacteria in the blood, and a check of your pulse, blood pressure and breathing. Antibiotics are usually started through a drip early, often before results return. If you are very unwell, you may be moved to intensive care.
Can I travel without a spleen?
Yes, with planning. See your doctor well before the trip to check vaccines and to ask about malaria prevention if you are going to an area where it is common. Carry your emergency card and any medicines your doctor has given you, and know where the nearest hospital is.
Can CION help after the emergency?
Once the emergency is over, CION's haematology team can review why your spleen was removed or is not working, look at your vaccine record, and agree a fever plan with you. For the fever itself, always go to the nearest emergency department first. Do not travel across the city to reach a clinic.
Your Haematologist
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Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. A haematology consultation can be booked at any of these centres through one helpline, and your team will tell you where each test or treatment takes place.
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Sources
- NHS — Spleen problems and spleen removal
- NHS — Sepsis
- NHS — Pneumococcal vaccine
- World Health Organization — Sepsis fact sheet
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
Benign Haematology EmergenciesEvery blood-related emergency in one placeSickle Cell Crisis: When to Go to HospitalSickle cell often leaves the spleen not workingEmergency Card for Blood Disorder PatientsA card that tells triage you have no spleenBlood counts during chemotherapyWhen a low white cell count adds to fever risk
Talk to us
No spleen and want a fever plan in place?
In a fever emergency, go to the nearest emergency department first. Afterwards, call the helpline and CION's haematology team will review your history, vaccines and plan with you.