Most back pain is muscular and settles on its own. But when pain starts travelling — from the lower back into the buttock and down the leg — it usually means a nerve is being irritated or compressed. That is sciatica, and knowing when it is routine and when it is a warning sign can save you from lasting nerve damage.
What sciatica actually is
Sciatica is not a diagnosis — it is a symptom. It describes pain along the path of the sciatic nerve, most often caused by a herniated (slipped) disc pressing on a nerve root in the lower spine. Other causes include narrowing of the spinal canal (lumbar stenosis) and slippage of one vertebra over another (spondylolisthesis). Identifying the cause is what determines the right treatment.
Typical symptoms — and what they mean
Classic sciatica causes sharp, burning or electric pain radiating below the knee, often worse with sitting, coughing or sneezing. Tingling or numbness in a specific part of the leg or foot maps to the particular nerve root involved. Pain alone, even severe pain, is usually not dangerous — it is distressing but typically improves over six to twelve weeks with correct care.
The red flags that need urgent attention
Seek prompt medical evaluation if you notice progressive weakness in the leg or foot, a foot that slaps or drags when walking (foot drop), numbness in the inner thighs or around the buttocks, or any change in bladder or bowel control. These signs suggest significant nerve compression, and delay can make recovery incomplete even after treatment.
How sciatica is treated
Most episodes settle with a structured plan: staying gently active rather than bed rest, targeted physiotherapy, posture and ergonomic correction, and short, sensible use of medication. When symptoms persist despite good conservative care, or when neurological signs appear, minimally invasive options such as endoscopic discectomy can relieve the compression through a very small incision — with generally very good results for leg pain.
When to see a specialist
See a spine specialist if leg pain persists beyond a few weeks, keeps returning, or is accompanied by numbness or weakness — and urgently if any red-flag sign appears. A clinical assessment together with an MRI identifies the exact cause and whether conservative treatment or a procedure is the appropriate next step. You can also send your MRI through this website for a preliminary review.
Key takeaways
- Sciatica is a symptom of nerve compression, most often from a slipped disc.
- Most episodes improve within 6–12 weeks with active, structured care.
- Weakness, foot drop or bladder/bowel changes are emergencies — do not wait.
Educational information only — not a substitute for professional medical advice, diagnosis or treatment.