Discitis - A rare spinal infection that needs prompt medical assessment
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Discitis is an infection affecting the spinal disc, sometimes involving the nearby vertebrae as well. It is uncommon, but when it occurs it can cause severe, persistent back pain, significant stiffness, and systemic symptoms such as fever or feeling generally unwell.
Why discitis causes severe, persistent back pain and should not be ignored
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Unlike most causes of back pain, discitis is not mechanical and does not improve with rest or simple pain relief. Because it involves infection, early recognition and treatment are important to prevent complications and long-term damage.
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This page explains what discitis is, how it presents, how it is diagnosed, and when urgent medical assessment is required.
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What is discitis?
Discitis is an infection of the intervertebral disc — the soft structure that sits between the bones of the spine. In adults, the infection often also spreads to the adjacent vertebrae, a situation sometimes referred to as discitis–osteomyelitis.
The infection is usually caused by bacteria that reach the disc via the bloodstream, although it can occasionally occur after spinal surgery, injections, or invasive procedures.
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Discitis is rare, but it is serious and requires medical treatment.
How does discitis develop?
In most cases, discitis develops when bacteria enter the bloodstream and settle in the spinal disc. This may happen following:
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a recent infection elsewhere in the body
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surgery or invasive medical procedures
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intravenous drug use
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a weakened immune system
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Sometimes, no clear source of infection is identified.
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Because spinal discs have a limited blood supply, infections can be difficult for the body to clear without treatment.
Who is at higher risk of discitis?
Discitis can occur at any age, but certain factors increase risk, including:
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older age
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diabetes
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immune suppression
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long-term steroid use
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cancer or chemotherapy
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recent spinal surgery or injection
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chronic kidney disease
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However, discitis can still occur in people without obvious risk factors.
What symptoms does discitis cause?
Discitis often presents very differently from typical back pain.
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Common features include:
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severe, constant back pain that does not ease with rest
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pain that worsens at night
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marked stiffness and reluctance to move
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difficulty standing or walking due to pain
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fever, chills, or sweats (not always present)
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feeling generally unwell or fatigued
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In children, discitis may present as refusal to walk, limping, or unexplained irritability.
Why discitis is often missed early on
Discitis can be difficult to recognise in its early stages because:
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back pain is common and usually benign
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fever may be absent
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early X-rays are often normal
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However, pain from discitis tends to be progressive, unrelenting, and disproportionate to movement or activity — a key distinguishing feature.
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Persistent severe back pain with systemic symptoms should always raise suspicion.
How is discitis diagnosed?
Diagnosis typically involves:
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blood tests to look for infection and inflammation
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MRI scanning, which is the most sensitive imaging test
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blood cultures to identify the infecting organism
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Early diagnosis is important to guide appropriate antibiotic treatment and prevent complications.
How is discitis treated?
Discitis is treated medically, usually with:
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prolonged courses of intravenous and/or oral antibiotics
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pain management
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careful monitoring with blood tests and imaging
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Hospital admission is often required, particularly in the early stages.
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Surgery is uncommon but may be needed if:
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there is spinal instability
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abscess formation occurs
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neurological symptoms develop
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infection does not respond to antibiotics
What is the recovery like?
Recovery from discitis can be slow and requires patience.
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Most people improve with appropriate antibiotic treatment, but:
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pain may persist for weeks or months
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gradual rehabilitation is often needed
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fatigue is common during recovery
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Physiotherapy usually plays a role after infection control, helping restore movement, strength, and confidence.
When should you seek urgent medical advice?
You should seek urgent medical assessment if you have:
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severe, persistent back pain that does not ease with rest
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back pain with fever, chills, or night sweats
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unexplained back pain with feeling generally unwell
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back pain following recent infection or surgery
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Discitis is rare — but missing it can have serious consequences.
The key message
Discitis is:
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uncommon
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serious
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non-mechanical
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treatable when recognised early
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Most back pain is not dangerous, but discitis is an important exception. Persistent, severe pain with systemic symptoms should always be investigated.
The key message
Discitis is:
​
-
uncommon
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serious
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non-mechanical
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treatable when recognised early
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Most back pain is not dangerous, but discitis is an important exception. Persistent, severe pain with systemic symptoms should always be investigated.
Frequently Asked Questions about Discitis
What is discitis?
Discitis is an infection of the spinal disc, often involving the nearby vertebrae as well. It is uncommon but serious, and it requires medical treatment rather than physical or mechanical management.
How common is discitis?
Discitis is rare, especially compared to common causes of back pain such as muscle strain or disc degeneration. Most people with back pain will never develop discitis, but it is an important diagnosis not to miss.
What does discitis pain feel like?
Pain from discitis is usually:
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severe and constant
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present at rest and often worse at night
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not relieved by changing position
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associated with marked stiffness and reluctance to move
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This type of pain behaves very differently from mechanical back pain.
Does discitis cause fever or illness?
Sometimes, but not always. Some people develop fever, chills, sweats, or feel generally unwell, while others may have severe back pain without obvious systemic symptoms, which can delay diagnosis.
What causes discitis?
Discitis is usually caused by bacteria entering the bloodstream and settling in the spinal disc. This may occur after an infection elsewhere in the body, surgery, injections, or invasive procedures. In some cases, no clear source is identified.
Who is most at risk of discitis?
Risk is higher in people with:
​
-
a weakened immune system
-
diabetes
-
cancer or chemotherapy
-
long-term steroid use
-
chronic kidney disease
-
recent spinal surgery or procedures
​
However, discitis can still occur in people without obvious risk factors.
How is discitis diagnosed?
Discitis is usually diagnosed using:
​
-
blood tests to look for infection and inflammation
-
MRI scanning, which is the most sensitive imaging test
-
blood cultures to identify the infecting organism
​
Early X-rays are often normal and cannot rule discitis out.
Can physiotherapy treat discitis?
No. Discitis is an infection, not a mechanical problem, and it cannot be treated with physiotherapy alone. Physiotherapy is usually introduced after the infection is controlled, to help restore movement and strength during recovery.
How is discitis treated?
Treatment typically involves:
​
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prolonged courses of antibiotics (often initially given intravenously)
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pain management
-
careful medical monitoring
​
Hospital admission is common, particularly early in treatment.
When should I seek urgent medical advice?
You should seek urgent assessment if you have:
​
-
severe, persistent back pain that does not improve with rest
-
back pain with fever, chills, or night sweats
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back pain with feeling generally unwell
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worsening pain following recent infection, surgery, or spinal procedure
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Discitis is rare, but early diagnosis makes a significant difference.
Why You Should Choose Chris Heywood Physio
The most important thing when seeking help is finding a practitioner you trust—someone who is honest, responsible, and clear about your diagnosis, the treatment you really need, and whether any follow-up appointments are necessary.
I’m not here to poach you from another therapist, but if you’re looking for a new physiotherapist in Northamptonshire or simply want a second opinion, here’s why many people choose to work with me (read my reviews):
Over 25 Years of Experience & Proven Expertise
With 25+ years of hands-on physiotherapy experience, I’ve built a trusted reputation for clinical excellence and evidence-based care. My approach combines proven techniques with the latest research, so you can feel confident you’re in safe, skilled hands.
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Thoroughly assess your condition
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Provide focused, effective treatment
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Explain what’s really going on in a clear, simple way
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Your treatment plan is tailored specifically to you, aiming for long-term results, not just temporary relief.
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I believe the best outcomes happen when you understand your body. I’ll explain your condition clearly, give you practical tools for self-management, and step in with expert hands-on treatment when it’s genuinely needed.
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Book an appointment today and take the first step towards feeling better.
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On a Monday and Tuesday I work as a advance musculoskeletal specialist in primary care but I can still be contacted for enquiries. You are welcome to call but it is often faster for me to reply via an email or watsapp message, simply as my phone will be on silent in clinic. Either way, I will reply as soon as possible, which in the week, is almost always on the same day at the latest.
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