TL;DR: At a Glance Definition: A herniated disc occurs when the inner "jelly" of a spinal disc leaks out and compresses nearby nerves. Key Signs: Sciatica (leg pain), numbness, muscle weakness, and pain that worsens when sitting or coughing. Diagnosis: If the pain does not start to settle within a few weeks, a specialist clinical assessment and MRI scan are indicated for an accurate diagnosis. Treatment: Most cases resolve with conservative disc herniations treatment...