Sciatica refers to pain that radiates along the path of the sciatic nerve, which branches from your lower back through your hips and buttocks and down each leg. Typically, sciatica affects only one side of the body. It is often caused by a herniated disc, bone spur, or spinal stenosis that compresses part of the nerve. This compression causes inflammation, pain, and often some numbness in the affected leg.
Common Causes of Sciatica
Several factors can contribute to the development of sciatica, including:
- Herniated Disc: A common cause of sciatica, where the soft center of a spinal disc pushes out and compresses the sciatic nerve.
- Bone Spurs: Overgrowth of bone on the vertebrae can press on the sciatic nerve.
- Spinal Stenosis: Narrowing of the spinal canal can compress the sciatic nerve.
- Piriformis Syndrome: The piriformis muscle, located deep in the buttocks, can irritate the sciatic nerve.
- Trauma or Injury: Falls, car accidents, or other injuries to the lower back or spine can lead to sciatica.
- Degenerative Disc Disease: The discs between the vertebrae wear down, increasing the risk of nerve compression.
- Obesity: Extra body weight can increase pressure on the spine and contribute to sciatic nerve compression.
- Prolonged Sitting: Sitting for extended periods, particularly with poor posture, can irritate the sciatic nerve.
- Symptoms of Sciatica
Sciatica typically presents with specific symptoms, most of which are related to irritation of the sciatic nerve:
Radiating Pain: The hallmark symptom of sciatica is pain that starts in the lower back or buttock and radiates down the leg. The pain can extend all the way to the foot. - Sharp or Burning Sensation: Sciatica pain is often described as a sharp, burning sensation, sometimes accompanied by shooting pain when moving.
- Numbness or Tingling: Sciatica may cause numbness, tingling, or a pins-and-needles sensation in the affected leg or foot.
- Muscle Weakness: Weakness in the leg or foot can occur due to nerve compression, which may make it difficult to walk or stand.
- Worsening Pain with Movement: Sciatica pain often worsens with certain movements, such as sitting for long periods, standing, or lifting heavy objects.
Diagnosis of Sciatica
To diagnose sciatica, doctors typically begin with a detailed medical history and physical exam, followed by imaging tests if needed:
- Medical History and Physical Exam: The doctor will assess your symptoms and test your range of motion, muscle strength, and reflexes.
- Imaging Tests:
- X-rays: While X-rays won’t show nerve damage, they can help rule out other causes, such as bone spurs.
- MRI: An MRI provides detailed images of the spine and can reveal herniated discs or compressed nerves.
- CT Scan: Sometimes used to get a more detailed view of the spinal structure and surrounding tissues.
- Electromyography (EMG): This test can measure how well the nerves are functioning and whether there is nerve damage.
Surgery
Surgery is generally considered only if sciatica does not improve with conservative treatments, or if the patient has severe pain, weakness, or loss of bowel/bladder control. Surgical options include:
- Discectomy: Removal of part or all of a herniated disc that is pressing on the nerve.
- Laminectomy: Removing a portion of the vertebra to relieve pressure on the nerve.
Surgery may be necessary if there is significant nerve damage, or if conservative treatments fail to provide relief after several months.
When to See a Doctor
- Severe Pain: The pain is intense and disrupts your daily activities.
- Numbness or Weakness: You experience numbness, weakness, or difficulty moving your leg or foot.
- Loss of Bowel or Bladder Control: This is a medical emergency and may indicate cauda equina syndrome, requiring immediate treatment.
- No Improvement: If after a few weeks of home care and physical therapy, your symptoms do not improve.
Treatment for sciatica typically starts with non-surgical approaches to alleviate pain and inflammation. Common
Sciatica can be extremely painful and debilitating, but with the right diagnosis and treatment, many people recover fully. Most cases of sciatica can be managed with physical therapy, medications, and lifestyle changes. However, if you experience severe pain or neurological symptoms such as leg weakness or loss of bladder control, seek medical attention immediately for a more comprehensive treatment plan.