Lower back pain rarely starts at a convenient time. It can appear after a gym session, a long day at a desk, lifting shopping from the boot, or simply waking up stiff and sore. If you are searching for 10 Common Causes of Lower Back Pain and When to Seek Physiotherapy Northampton and Kettering, the key is knowing what is likely to settle with sensible care and what needs prompt professional assessment.
10 common causes of lower back pain
1. Muscle or ligament strain
This is one of the most frequent causes. It often follows lifting, twisting, sport, gardening, or a sudden awkward movement. Pain may feel localised, tight, or sharp, and it can worsen when you bend or change position. Many strains improve within days to a couple of weeks, but recurring strain can point to weakness, reduced mobility, or poor movement control that needs treatment.
2. Poor posture and prolonged sitting
Working at a desk, driving for long periods, or spending hours on the sofa can place sustained load on the lower back. This does not always mean posture is the sole cause, but prolonged static positions often make symptoms worse. People commonly notice stiffness first, then aching, then pain that starts to interfere with work or sleep.
3. Disc irritation or a slipped disc
Discs act as cushions between the vertebrae. When a disc becomes irritated or bulges, it can cause lower back pain and sometimes leg pain, tingling, numbness, or weakness. Symptoms are often aggravated by sitting, bending, coughing, or prolonged driving. Not every disc issue is severe, but nerve-related symptoms should be assessed early.
4. Sciatica
Sciatica refers to irritation of the sciatic nerve, usually causing pain that travels from the lower back or buttock down the leg. Some people describe burning, shooting, or electric-type pain. Sciatica can be linked to disc problems, narrowing around the nerve, or inflammation. If symptoms are persistent or progressing, physiotherapy can help identify the source and guide treatment.
5. Facet joint irritation
The small joints at the back of the spine can become irritated through repetitive extension, twisting, arthritis, or general wear and tear. This pain is often more local to one side of the back and may worsen with standing, arching backwards, or turning. It can feel deceptively similar to a muscle strain, which is why assessment matters.
6. Sacroiliac joint dysfunction
The sacroiliac joints sit where the spine meets the pelvis. If they become stiff or irritated, pain may appear in the lower back, buttock, or hip area. It is common in runners, after pregnancy, or following uneven loading through the legs and pelvis. The pattern is often one-sided and can be aggravated by walking, stairs, or standing on one leg.
7. Arthritis and age-related changes
Osteoarthritis and other degenerative changes in the spine become more common with age, but they do not always cause pain. When they do, symptoms tend to include stiffness, reduced mobility, and discomfort after inactivity. The right treatment usually focuses less on scans and more on improving movement, strength, and function.
8. Weak core and reduced conditioning
Back pain is not always caused by one injury. Sometimes it builds gradually because the muscles supporting the spine are not coping well with daily load. This is common after time away from exercise, following surgery, or during periods of stress and inactivity. A structured rehabilitation plan is often more effective than rest alone.
9. Sports injuries and gym-related overload
Deadlifts, running, golf, football, racquet sports, and high-volume training can all aggravate the lower back if technique, recovery, or loading is off. In active adults, the issue is not always doing too much. Sometimes it is doing too much too soon, especially when returning after injury.
10. Post-operative or compensatory pain
After hip, knee, or abdominal surgery, people often move differently without realising it. That altered pattern can place extra stress on the lower back. If pain develops during recovery, it is worth checking whether the problem is the back itself or compensation elsewhere in the body.
When to seek physiotherapy in Northampton and Kettering
A mild strain that improves steadily over a few days may not need treatment. However, if your pain has lasted more than one to two weeks, keeps returning, limits your work, sleep, or exercise, or is travelling into the leg, it is sensible to book an assessment.
You should seek physiotherapy sooner if you are noticing numbness, tingling, weakness, difficulty standing upright, or pain that is becoming more intense rather than easing. Prompt treatment can help reduce irritation, improve movement, and stop short-term pain becoming a longer-term problem.
If your schedule makes it hard to attend daytime appointments, access matters as much as treatment quality. For working adults in Northampton or Kettering, direct-access clinics with evening or weekend availability can make it far easier to start rehab before the problem worsens.
What a physiotherapy assessment should look for
A thorough assessment should not just confirm that your back hurts. It should identify what structure is likely involved, what movements aggravate it, whether nerves are affected, and what is driving the problem in the first place. That might include weakness, reduced hip mobility, poor lifting mechanics, post-operative compensation, or a training error.
Treatment depends on the findings. It may include manual therapy, exercise rehabilitation, advice on activity modification, or evidence-based options such as shockwave therapy, acupuncture, or electrotherapy where clinically appropriate. The aim is not just short-term relief, but a safer and more durable recovery.
When back pain needs urgent medical attention
Physiotherapy is appropriate for many cases of lower back pain, but some symptoms need urgent medical review. Seek immediate help if you have loss of bladder or bowel control, numbness around the saddle area, severe unexplained weakness in both legs, fever with back pain, unexplained weight loss, or pain after significant trauma.
Most lower back pain is not dangerous, but it is still disruptive. If it is stopping you from working comfortably, training normally, or moving with confidence, getting it assessed early usually saves time, reduces frustration, and gives you a clearer route back to normal activity.