back pain with fever
Informed by recognized medical guidance
Overview
Back pain with fever means you have pain in your back and a raised body temperature at the same time. This combination can be a sign of an infection such as a kidney infection or, in rare cases, an infection in the spine. It should always be checked by a doctor.
Key facts
- Back pain is extremely common, but when it happens with a fever, it needs medical attention.
- Most cases are not serious and settle with rest and fluids.
- A kidney infection is a common cause of back pain with fever.
- A spinal infection is rare but serious, and needs early treatment.
- Call your local emergency number straight away if you have back pain with fever and leg weakness, numbness in the groin, or difficulty controlling your bladder.
- Prompt medical care can prevent most long-term problems.
Back pain alone is very common. The combination of back pain and fever is less common. It is often due to a viral illness or a urine infection, but it should never be ignored.
It can affect anyone, but people with diabetes, kidney disease, a weakened immune system, recent back surgery, or those who use injected drugs have a higher risk of a serious infection.
Symptoms
- Back pain with fever and sudden weakness or numbness in your legs
- Loss of control of your bladder or bowels
- Numbness in your groin or around your back passage
- High fever with a stiff neck and severe headache
- Sudden severe back pain after a fall or injury
- ⚠Fever above 38°C (100.4°F) with back pain
- ⚠Pain that is getting worse despite rest
- ⚠Pain or burning when you urinate, or blood in your urine
- ⚠Back pain after a recent operation or medical procedure
- ⚠Back pain during pregnancy
- ⚠If you have a weakened immune system or diabetes
Common symptoms
- Aching, throbbing or sharp pain in the lower or middle back
- Fever, chills or sweats
- Pain that gets worse at night
- Difficulty moving or bending due to pain
- Feeling generally unwell or tired
- Tenderness when pressing on the spine
Symptoms in children
- Back pain with a fever
- Fussy, irritable or crying more than usual
- Refusing to walk or limping
- Holding the back stiffly or arching it
- Loss of appetite or vomiting
Symptoms in older adults
- New or unusual back pain
- Confusion or acting differently
- A fall or difficulty balancing
- Weakness in the legs
- A fever that may be lower than expected
Causes
Main causes
- A urinary tract or kidney infection
- A viral infection such as flu
- An infection in the spine, such as vertebral osteomyelitis or a disc infection
- An abscess around the spinal cord (spinal epidural abscess)
- Shingles attacking the nerves before the rash appears
- Inflammatory conditions that affect the joints of the spine
Risk factors
- Diabetes
- Kidney or urinary tract disease
- Recent spinal injection, surgery, or epidural
- Long-term use of steroid medication
- Injected drug use
- A urinary catheter
- Cancer or a weakened immune system
When to see a doctor
See a doctor urgently if:
- Fever with back pain and any sign of nerve problems, such as leg weakness or numbness
- Symptoms of a urinary infection, including painful urination
- Back pain with fever after surgery or a recent hospital stay
- If you are pregnant or have a medical condition that weakens your immune system
Book a routine appointment if:
- Back pain and fever that last longer than 3 days
- Mild symptoms that are not improving with rest and fluids
- If you have repeated episodes of back pain with low-grade fever
Diagnosis
A doctor will listen to your symptoms, check your temperature, and examine your back. They may gently press on your spine and test your strength, balance, and bladder function as part of the examination.
Tests that may be done
- A urine test to check for a kidney or urinary infection
- Blood tests to look for signs of inflammation or infection
- An X-ray to see the bones of your spine
- An MRI or CT scan to look for infection in the spine or soft tissues
- In some cases, a spinal fluid sample (lumbar puncture) if meningitis is suspected
What to expect at your appointment
The doctor will explain what tests they recommend and why. You may be asked to wait in the clinic for results or to return later. If an infection is found, treatment will usually begin quickly.
Treatment
Treatment depends on the cause. A simple viral infection may only need rest, fluids and fever relief. A bacterial infection such as a kidney infection will need antibiotics. Spinal infections almost always require hospital care.
Self-care at home
- Take regular rest, but try to move around gently once the fever has settled
- Drink plenty of fluids to stay hydrated
- Use warm or cool packs on the painful area for comfort
- Avoid heavy lifting and vigorous exercise until the pain improves
- Take only the medicines recommended by your doctor or pharmacist
Medical treatments
Your healthcare team may prescribe antibiotics by mouth or through an IV line if there is a bacterial infection. They may also recommend safe pain and fever relief. If the infection affects the spine, you may need a course of intravenous antibiotics in the hospital. Always take the full course exactly as prescribed.
When is surgery considered?
Surgery is rarely needed. It may be considered if there is an abscess pressing on the spinal cord or if a spinal infection is causing severe nerve damage.
Living with this condition
Follow your doctor's plan and finish all prescribed treatments. Keep in touch with your care team if symptoms do not improve. Attend follow-up appointments, even if you feel better.
Lifestyle tips
- Stay hydrated and eat nourishing meals to support your recovery
- Keep active gently when you are able, and increase activity slowly
- Avoid smoking, as it can slow healing
- Practice good posture and use comfortable seating
- Support your back when lifting anything heavy
Diet and exercise
A balanced diet with plenty of fruit, vegetables and lean protein helps your body fight infection. Once your fever has gone, gentle walking, stretching and core-strengthening exercises can help rebuild strength. Check with your doctor before restarting any exercise.
Mental health and emotional wellbeing
Waiting for answers or living with pain can be stressful and worrying. It is normal to feel anxious. Talk about how you feel with your doctor, family or friends. If you are struggling, ask your care team about local mental health support.
Prevention
Not all causes can be prevented, but you can lower your risk by treating urinary infections early, managing diabetes carefully, avoiding smoking, and keeping your immune system strong with a healthy lifestyle.
Vaccines
Stay up to date with recommended general vaccinations, such as the flu and pneumonia vaccines, to reduce your chance of catching infections that can affect the body.
Screening programmes
There is no routine screening for back pain with fever, but regular check-ups for long-term conditions like diabetes can help prevent complications.
Complications
If left untreated
- An infection may spread to other parts of the body, including the bloodstream
- A spinal infection could lead to nerve damage or permanent weakness
- A kidney infection could worsen and cause sepsis
- Chronic back pain if the underlying problem is not treated
Long-term outlook
With early medical care, most people recover fully. Even spinal infections, when treated promptly, have good outcomes. The key is to speak to a doctor as soon as possible.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.