You should see a neurosurgeon for back pain if you experience red-flag symptoms indicating nerve involvement, such as severe leg weakness, numbness in the saddle area, loss of bowel/bladder control, or pain radiating down the legs, often indicating conditions like hernia or stenosis.

Critical brain tumor warning signs include new, persistent headaches (often worse in the morning), sudden unexplained seizures, vision changes (blurred/double), personality shifts, cognitive decline, weakness/numbness on one side, and severe vomiting.

A slip disc (herniated disc) is a structural spinal injury where inner disc material protrudes and compresses nerves, while sciatica is the resulting symptom—pain, numbness, or tingling radiating along the sciatic nerve from the lower back down the leg.