Herniated Disc
A herniated disc, sometimes called a slipped disc, happens when the soft cushion between the bones of the spine pushes out through its tougher outer layer. This can press on nearby nerves, causing pain, numbness or weakness, most often in the lower back or neck. Many cases improve on their own with time.
Overview
What is a herniated disc?
Between each bone of the spine sits a disc, a soft cushion with a tough outer ring and a softer centre. A herniated disc occurs when some of the softer inner material pushes through the outer ring. If this bulge presses on a nearby spinal nerve, it can cause pain, tingling or weakness that may spread along the nerve's path.
How common is a herniated disc and who does it affect?
Herniated discs are a common cause of back and neck pain. They occur most often in adults between roughly 30 and 50 years of age, as the discs naturally lose some flexibility with time. Men are affected somewhat more often than women. They can happen at any spinal level but are most frequent in the lower back.
Symptoms and Causes
What are the symptoms of a herniated disc?
Symptoms depend on where the disc is and whether a nerve is affected. A herniated disc in the lower back may cause pain that radiates into the buttock and leg, sometimes called sciatica. In the neck, it may cause pain spreading into the shoulder and arm. Numbness, tingling or muscle weakness can also occur. Some herniated discs cause no symptoms.
What causes a herniated disc and who is at risk?
Discs can herniate due to gradual age-related wear or, less often, a sudden strain such as lifting heavily with poor technique. Factors that raise the risk include increasing age, being overweight, physically demanding work, repetitive bending or twisting, and smoking. A family tendency may also play a part in how discs age over time.
Diagnosis and Tests
How is a herniated disc diagnosed?
Doctors usually diagnose a herniated disc from your symptoms and a physical examination, checking movement, reflexes, sensation and muscle strength. Many cases need no scans. If symptoms are severe, persistent or suggest significant nerve involvement, imaging such as an MRI scan may be used to confirm the location and rule out other causes.
Management and Treatment
How is a herniated disc treated or managed?
Most herniated discs improve without surgery over several weeks. Care often includes staying gently active, physiotherapy, pain-relieving medication and gradually returning to normal activities. Prolonged bed rest is usually discouraged. If severe pain, weakness or nerve symptoms persist despite these measures, a specialist may discuss further options, including injections or surgery, after careful assessment.
Prevention
Can a herniated disc be prevented or its risk reduced?
You cannot prevent all disc problems, but you can lower your risk. Keeping the back and core muscles strong through regular exercise, lifting carefully using your legs, maintaining good posture and reaching a healthy weight all help protect the spine. Avoiding smoking and taking breaks from prolonged sitting may also reduce strain on the discs.
Additional Common Questions
Is a slipped disc the same as a herniated disc?
Yes. Slipped disc, prolapsed disc and herniated disc all describe the same problem, where the soft inner part of a spinal disc pushes out through its outer layer.
Do I need surgery for a herniated disc?
Most people do not. The majority of herniated discs settle with time, activity and physiotherapy. Surgery is usually considered only when symptoms are severe or do not improve.
When should I see a doctor urgently?
Seek urgent care if you develop loss of bladder or bowel control, numbness in the groin or genital area ('saddle anesthesia'), or progressive leg weakness, as these are signs of Cauda Equina Syndrome, a medical emergency requiring immediate evaluation.
This health topic is for general information and is not a substitute for professional medical advice. Always consult a qualified clinician about your individual situation. See our medical disclaimer.