- The most typical and common symptom of lower back disc problems is caused by bulge, hernia, or sequestration where the disc mechanically presses or chemically irritates the nerve root, causing typical radiating disc symptoms in the buttocks, back of the thigh, calf, and foot.
- The most common symptoms of lower back disc problems are pain and various types of numbness and/ or muscle wekanesess in the lower leg.
- Treatment for disc problems reduces pain and increases functional capacity, allowing the disc bulge to heal over time and the symptoms to subside through a favorable natural course.
Low back disc bulging, disc herniation, sequestration
The discs located between the vertebrae act as shock absorbers, balancing and distributing the pressure on the back. The low back is the most common area of the back to develop disc bulging (small structural disc change), or disc prolapse (partial disc herniation / damage to outer layer of the disc) or sequestration (full disc herniation / damage to outer layer of disc).
The disc problems in the low back are the most common compared to neck or midback because the low back is subject to the most pressure in the entire back area and also there is a relatively high degree of movement.
Mechanism of low back disc bulging, herniation, and sequestration
A bulging disc, or disc prolapse, occurs when the gelatinous substance (nucleus pulposus) inside the disc located between the vertebrae of the spine pushes through the wall of a broken or weakened disc (annulus fibrosus). This can cause chemical irritation and mechanical pressure on the nerve roots, resulting in typical lower limb symptoms. In disc problems, it is quite typical that lower back pain is milder than buttock or lower limb pain.
In disc problems, damage to the fibrous edge of the disc itself is less common and can cause localised stabbing pain, particularly during certain movements. In disc bulging, it is also possible that the edge of the disc breaks, allowing the acidic fluid inside the disc to irritate the nerve. In this case, the pain symptoms are usually more severe and intensive than in a small disc bulge. If the disc bulge is large and located in the center, the symptoms may be felt in both legs.
Prevalence of disc herniation
Statistically, about 5% of people will suffer from disc-related symptoms during their lifetime. Typically, disc problems occur between the ages of 30 and 50. Despite the possibility of severe symptoms, about 90% of disc patients recover within about three months. In magnetic resonance imaging, approximately 80% of bulges disappear on their own within six months. Due to the good prognosis, fewer and fewer surgeries are being performed for various disc problems. Magnetic resonance imaging shows that disc bulging is also a common finding in the normal population without pain or symptoms suggestive of nerve root compression. On the other hand, in typical disc problems, the findings of clinical examination usually correspond well with the imaging findings.
Disc problems are significantly less common than various functional joint, muscle, and connective tissue problems, which cause local and radiating pain in statistically more than 90% of cases. At the clinic, we constantly see patients suffering from pain who clearly have both disc problems and various functional disorders related to back joints, muscles, and fascia. The treatment of these conditions is largely based on non-pharmacological treatment of disc problems, which aims to reduce pain and increase functional capacity, allowing the disc bulge to heal over time and the symptoms to diminish through a favorable natural course. In general, chronic pain is associated with factors other than the actual initial structural change.
Symptoms of low back disc problems
- Severe unilateral radiating pain locally and/or in the lower extremities.
- Most commonly, forward bending increase the symptoms.
- Various sensory and/ or motory changes in the lower limb. Most commonly, sensation is reduced in the lower leg, foot, and sole of the foot.
- Larger disc bulges can also affect muscle strength, such as walking on the toes and heels.
- Most commonly, the disc prolapse is located between the L5-S1 vertebrae, causing radiating symptoms in the back of the thigh, calf, and foot.
- Less common L3-L4 disc prolapses are felt more in the front of the thigh, and hip extension is the movement that causes the most pain.
- Large disc prolapses in the middle of the disc can be felt in both lower limbs.
- Most people with disc problems experience radiating leg pain and few local symptoms in the low back.
Causes of prolonged pain after disc problems
Prolonged symptoms are usually caused by a combination of several factors rather than just one of the factors listed below. Almost always, the disc problems are caused by genetical factors and lifestyle factors have much less involvement compared to persisten unspesific low back pain.
- Hereditary connective tissue type that causes hypermobility and joint hypermobility
- Psychological factors, such as anxiety, catastrophizing, depression, and/or excessive mental strain.
- Lifestyle factors, such as too little or too repetitive exercise, insufficient or poor-quality sleep
- Local or central nervous system sensitization of the pain system
Treatment and rehabilitation of lower back disc problems
Treatment usually includes:
- Manual therapy to treat joint, muscle, and fascia dysfunctions.
- Neurological rehabilitation to address individual neurological deficits.
- Individual exercises to improve posture and movement.
- Acupuncture to treat pain and pain sensitization.
- Lifestyle guidance to improve exercise, sleep, rest, and eating habits.
Read more about related pain syndromes:
Hip flexor pain (Psoas syndrome)
Viimeksi päivitetty 13.10.2025
