Herniated Disc: Causes, Symptoms, Treatment, and How Physiotherapy Can Help

Reviewed by the Physiotherapy Team at Waterloo Sports Medicine Centre 

A herniated disc is a common spinal condition that can cause back pain, stiffness, and sometimes pain that travels into the legs.  

What Is a Herniated Disc? 

Your spine is made up of individual bones called vertebrae, which are separated by small, cushion-like structures called intervertebral discs. These discs help absorb shock and allow your spine to move comfortably. 

Each disc has two main parts: 

• Nucleus pulposus: A soft, gel-like center that provides cushioning 

• Annulus fibrosus: A strong outer layer that surrounds and supports the inner material 

A herniated disc occurs when a tear or weakness develops in the outer layer of the disc, allowing the inner gel-like material to push outward. This may irritate nearby spinal nerves, leading to pain, numbness, tingling, or weakness. Herniated discs most commonly occur in the lower back (lumbar spine) but can also occur in the neck (cervical spine). 

What Causes a Herniated Disc? 

Herniated discs usually develop gradually due to changes in the disc over time, but they can also occur after an injury. 

Common causes include: 

• Age-related disc degeneration and reduced disc flexibility 

• Repetitive bending, lifting, or twisting movements 

• Improper lifting techniques 

• Sudden injury or trauma 

• Repeated stress from work, sports, or daily activities 

  
  

Risk Factors 

Certain factors may increase your risk of developing a herniated disc, including: 

• Age, especially between 30 and 50 years old 

• Physically demanding jobs involving heavy lifting 

• Repetitive spinal movements 

• Reduced core and back muscle strength 

• Smoking, which can affect spinal disc health 

• Previous back injuries  

  
  

Common Symptoms of a Herniated Disc 

Symptoms depend on whether the herniated disc irritates nearby nerves. Some people may have a herniated disc without experiencing symptoms. 

Common symptoms include: 

• Lower back or neck pain 

• Pain that travels into the buttock, thigh, arm, or leg 

• Numbness or tingling 

• Muscle weakness 

• Reduced range of motion 

• Increased pain with sitting, bending, coughing, or lifting 

When a herniated disc affects a spinal nerve in the lower back, it may cause sciatica, which is pain, tingling, or numbness that travels down the leg. 

How Can Physiotherapy Help? 

A physiotherapy treatment plan may include: 

• Education about pain management and safe movement strategies 

• Exercises to improve spinal mobility and strength 

• Core and hip strengthening exercises 

• Postural and ergonomic education 

• Neural mobility exercises (“nerve glides”) when appropriate 

• Manual therapy techniques to improve movement and reduce discomfort 

• Gradual return-to-work, sport, and exercise programs 

Research supports exercise-based rehabilitation and staying active as important components of managing low back pain and disc-related symptoms. Most people improve without surgery. Over time, inflammation around the affected nerve may decrease, and the body can naturally reduce the size of the herniated disc material. 

If you are experiencing symptoms of a herniated disc, the physiotherapy team at Waterloo Sports Medicine Centre can provide a comprehensive assessment and personalized treatment plan to help you move comfortably and confidently again.