Sciatica vs. Disc Herniation: What Is the Difference and How Are They Treated?

Leg pain is one of the most common reasons patients visit a spine clinic. Two of the most frequently confused conditions are sciatica and lumbar disc herniation. While they are closely related, they are not the same thing — and understanding the difference helps patients seek the right treatment at the right time. Dr. Ghazwan Hasan's spine clinic in Baghdad evaluates and treats both conditions with the full range of conservative and surgical options.

What Is Sciatica?

Sciatica is not a diagnosis — it is a symptom. The term describes pain that travels along the path of the sciatic nerve, which runs from the lower back through the buttock and down the back of each leg to the foot. Sciatica typically affects only one side of the body. The pain can be sharp, shooting, burning, or electric in quality, and may be accompanied by numbness, tingling, or weakness in the leg or foot.

What Causes Sciatica?

Sciatica is caused by compression or irritation of the sciatic nerve or one of the nerve roots that form it (L4, L5, or S1). The most common cause is lumbar disc herniation, where the herniated disc material presses directly on a nerve root. Other causes include lumbar spinal stenosis (narrowing of the spinal canal compressing the nerve), spondylolisthesis (slippage of one vertebra over another), piriformis syndrome (the piriformis muscle irritating the sciatic nerve in the buttock), and less commonly, tumours or cysts.

How Are They Diagnosed?

Diagnosis begins with a detailed clinical history and physical examination, including nerve tension tests such as the straight leg raise. MRI of the lumbar spine is the gold standard imaging investigation, showing the exact location and size of any disc herniation and the degree of nerve compression. Nerve conduction studies (NCS) and electromyography (EMG) may be ordered to assess the severity of nerve involvement and guide treatment decisions.

Treatment: From Conservative to Surgical

Most cases of sciatica from disc herniation improve within 6 to 12 weeks with conservative management. Treatment follows a step-by-step approach: rest and activity modification, non-steroidal anti-inflammatory medications (NSAIDs), physiotherapy with nerve mobilization exercises, epidural steroid injections to reduce nerve root inflammation, and when conservative treatment fails — or when neurological deficits are progressing — surgical intervention. For disc herniation, endoscopic discectomy or microdiscectomy removes the herniated fragment and decompresses the nerve, providing rapid and durable relief of sciatica in the vast majority of patients.

When Should You See a Spine Surgeon Urgently?

Seek immediate medical attention if you experience progressive weakness in the leg or foot, loss of bladder or bowel control (this is a surgical emergency called cauda equina syndrome), or sciatica following a significant trauma such as a fall or accident. These situations require urgent surgical evaluation and should not be managed at home.

Expert Sciatica Treatment in Baghdad

Dr. Ghazwan Hasan offers comprehensive evaluation and treatment for sciatica and disc herniation at his Baghdad clinic. With expertise in endoscopic discectomy, epidural injections, and minimally invasive spine surgery, he provides the full range of treatment options. Contact the clinic at +964 771 409 9298 or visit the Ashur Building, Al-Kindi Street, Harthiya, Baghdad.