The symptoms of a herniated lumbar disc are 1. back pain 2. leg pain 3. both back and leg pain. The essence of a herniated lumbar disc is that, after the disc protrudes, it compresses the surrounding nerve roots or the spine, leading to a series of clinical symptoms. Depending on the area of compression, different symptoms may occur; some people experience back pain, others leg pain, and in more severe cases, both back and leg pain. Therefore, pain is the primary symptom of a herniated lumbar disc. However, following the pain, there often occurs a restriction of movement. If a certain posture is not correct, it triggers pain. In severe cases, it may cause numbness or weakness in both legs, or result in urinary or bowel dysfunction.