Back pain is incredibly common — most of us will experience it at some point in our lives. The good news is that the vast majority of back pain is non-specific (often related to muscle strain, poor posture, or everyday wear and tear) and improves within a few weeks with the right movement, advice, and physiotherapy.

However, in a small number of cases, back pain can be a sign of something more serious. That’s why physiotherapists are trained to screen for “red flags” — warning signs that may indicate a need for further medical investigation.

Important note: Having one red flag does not automatically mean you have a serious problem. Red flags help raise suspicion so we can act quickly when needed. If you’re worried, it’s always better to get it checked.

What Are the Main Red Flags for Back Pain?

Here are the key symptoms and history points that warrant prompt medical attention:

1. Cauda Equina Syndrome (a medical emergency) This rare but serious condition involves compression of the nerves at the base of the spine. Seek urgent medical care (A&E or call 999/112) if you have:

• Loss of control of your bladder or bowels (incontinence or inability to pass urine)
• Numbness or tingling in the saddle area (around your back passage, genitals, or inner thighs)
• Significant weakness in both legs or difficulty walking
• Sexual dysfunction that started suddenly with your back pain

For more detailed information on symptoms and what to do, see this helpful NHS patient advice sheet: Cauda Equina Syndrome – Bucks Healthcare or the Torbay and South Devon CES page.

2. Possible Spinal Fracture Consider this if:

• Your back pain started after a significant fall, accident, or trauma
• You are over 50–70 years old and had a minor fall or even just a heavy lift
• You have been taking long-term steroids or have osteoporosis/osteopenia
• You feel severe point tenderness directly over the bones of your spine

3. Possible Infection in the Spine Seek medical review if back pain comes with:

• Fever, chills, or feeling generally unwell
• Recent infection elsewhere in the body (e.g., urinary tract infection)
• Intravenous drug use or a weakened immune system (e.g., diabetes, HIV, or taking immunosuppressant medication)

4. Possible Cancer or Tumour Be cautious if you have:

• A previous history of cancer (especially cancers that commonly spread to bone, such as breast, prostate, lung, or kidney)
• Unexplained weight loss
• Severe back pain that is constant, worse at night, and doesn’t ease with rest or position changes
• Pain that wakes you from sleep and is not relieved by usual painkillers

5. Other Concerning Signs

• Progressive or severe neurological symptoms (e.g., increasing numbness, tingling, or weakness in the legs)
• Back pain in people under 18 or over 50 with no clear mechanical cause
• Pain that has not improved at all after 4–6 weeks of conservative care

For a clear overview of when to seek help, the Mayo Clinic’s guide on Back Pain – When to See a Doctor is very helpful.

What Should You Do If You Notice Any Red Flags?

• Emergency symptoms (especially bladder/bowel changes or saddle numbness) → Go straight to your nearest Emergency Department or call an ambulance.
• Other red flags → Contact your GP, physiotherapist, or spine specialist promptly. We can help decide if you need imaging, blood tests, or a referral to a consultant.
• Even without red flags, if your pain is severe, getting worse, or stopping you from doing normal activities, book an assessment. Early physiotherapy often speeds up recovery and prevents problems becoming chronic.

The Reassuring Reality

Over 90–95% of people with back pain do not have a serious underlying condition. Most cases respond very well to:

• Gentle movement and staying active (avoid prolonged bed rest)
• Targeted physiotherapy exercises
• Good posture and ergonomic advice
• Simple pain management strategies

At our clinic, we always screen carefully for red flags during your initial assessment so you can feel confident that your treatment plan is safe and appropriate.

When to Book a Physiotherapy Assessment

If your back pain is affecting your daily life, work, or sleep — even without obvious red flags — early intervention from a physiotherapist can make a big difference. We focus on getting you moving safely, reducing pain, and building long-term resilience.

Have you experienced any of the symptoms above? Don’t wait and worry. Get in touch with our team today for a thorough assessment. We’re here to help you understand what’s happening and get you back to doing the things you love.