Lower back pain is one of the most common health problems in the UK. Around one in six adults lives with it, and it can make even simple daily tasks feel difficult. Whether your pain has just started or has been with you for months, understanding why it happens is the first step towards finding the right help.
This article explains the main causes of lower back pain, why some treatments do not always work, and how back pain clinical trials in the UK could open the door to new options.
What Is Lower Back Pain?
Lower back pain is pain felt in the area between your bottom ribs and your buttocks. It can feel like a dull ache, a sharp stabbing sensation, or a stiffness that makes it hard to move. For some people it comes and goes, while for others it becomes a constant part of daily life.
When pain lasts for more than 12 weeks, it is described as chronic lower back pain. This is the type that often has the biggest impact on quality of life, and it is the focus of a lot of current clinical research.
The Main Causes of Lower Back Pain
There is rarely one single cause. Lower back pain usually results from a mix of physical, lifestyle, and sometimes psychological factors. Here are the most common causes:
Muscle or Ligament Strain
One of the most frequent causes is a pulled muscle or stretched ligament. This can happen from lifting something heavy, making a sudden awkward movement, or from a sports injury. The pain usually comes on quickly and can feel quite sharp.
Slipped or Herniated Disc
Between each bone in your spine (called vertebrae) there is a small cushion of cartilage called a disc. If one of these gets pushed out of place, it can press on a nearby nerve and cause pain, sometimes shooting down into your leg. This is known as sciatica.
Poor Posture
Sitting or standing in the wrong position for long periods puts extra strain on the muscles and joints in your lower back. With so many people spending hours at a desk or on a screen, poor posture has become one of the biggest contributors to long-term back problems.
Sedentary Lifestyle
When the muscles around the spine are weak from not being used enough, they cannot support your back properly. This can lead to pain that builds gradually over time, often without a clear starting point.
Age-Related Changes
As we get older, the discs in our spine naturally lose water content and become less flexible. The joints can also develop wear and tear, a condition known as osteoarthritis. This is why back pain becomes more common in people over 40.
Stress and Mental Health
There is strong evidence that emotional stress, anxiety, and low mood can make back pain worse or even help cause it. When you are tense or anxious, your muscles tighten, and that physical tension can settle in your back.
Why Standard Treatments Do Not Always Work
For most people, lower back pain improves within a few weeks with rest, gentle movement, and over-the-counter pain relief. The NHS recommends staying as active as possible and avoiding long periods in bed, as movement helps the muscles recover.
However, for people with chronic back pain, standard treatments often fall short. When the pain has been there for months or years, simple painkillers may provide only limited relief.
Some people are prescribed opioid medicines for stronger pain control. While these can help in the short term, they carry a number of drawbacks, including:
- Drowsiness and difficulty concentrating
- Nausea
- Constipation
- A risk of becoming dependent on the medicine over time
- Tolerance, meaning higher doses are needed to get the same effect
Research suggests that people with chronic pain typically see only around a 30% improvement in symptoms from opioids, while between 50% and 80% experience side effects. For many people, this means living with pain that is not properly controlled, on medication that causes its own problems.
This is one of the main reasons clinical researchers are actively looking for better alternatives.
When Lower Back Pain Has No Clear Cause
One of the most frustrating aspects of chronic lower back pain is that scans and tests do not always find a clear explanation. This is known as non-specific lower back pain, and it accounts for the majority of chronic cases.
If you have been told your scan looks normal but you are still in significant pain, you are not imagining it. Non-specific back pain is a real, recognised condition, and it is one of the most studied areas in musculoskeletal research.
Could a Clinical Trial Help?
If your lower back pain has not responded well to standard treatments, a clinical trial could offer a genuine alternative. Clinical trials test new treatments that are not yet widely available, giving participants access to approaches that might work differently from what they have already tried.
At Clinical Trials UK, we are currently running a back pain trial for people who take opioid medicines for lower back pain and are looking for a different option. The trial explores whether herbal medicine treatments could offer better relief with fewer side effects.
You can read more about how clinical trials are helping people with back pain and the range of approaches researchers are currently testing.
There is also a separate piece looking at testing new treatments for chronic back pain that goes into more detail about what participation involves and who might be eligible.
Who Could Be Eligible?
You may be able to take part in our lower back pain trial if you:
- Are aged 18 or over
- Have had chronic lower back pain for more than 12 months
- Currently take opioid medication for pain relief
- Have not found enough relief from other treatments
Our research team will talk you through everything and make sure the trial is a good fit before you commit to anything.
What Does Taking Part Involve?
Taking part in a clinical trial is more straightforward than many people expect. The process at Clinical Trials UK follows three clear steps:
- Register your interest by calling us on 03300 575 838 or completing our online form. There is no pressure or obligation at this stage.
- Attend a screening visit at our Manchester (Swinton) or London (Ilford) clinic, where our team will review your health history and confirm your eligibility.
- Begin your participation, with regular support from our experienced research team throughout.
Travel expenses are covered for all visits. If you have questions before you decide, our frequently asked questions about taking part is a good place to start.
Is It Safe?
Yes. All trials run by Clinical Trials UK are approved by the MHRA (Medicines and Healthcare products Regulatory Agency) and follow strict safety guidelines. You will be monitored throughout, and you are free to withdraw at any time without it affecting your other healthcare.
Take the Next Step
If you have been living with lower back pain for a long time and nothing has worked well enough, a clinical trial could offer a new path. Our research team is here to answer your questions and help you decide whether taking part is right for you.
