Firstly, it should be clarified that for patients with lumbar disc herniation, if the condition recurs after surgery, a second operation is completely feasible. This is because there are many intervertebral discs involved, including L3-L4, L4-L5, and L5-S1, all of which can lead to lumbar disc herniation and subsequently cause symptoms of back and leg pain. Even if the patient has already undergone surgery for L4-L5, it cannot be guaranteed that L3-L4 or L5-S1 will not develop disc herniation. Therefore, it is possible for patients with lumbar disc herniation to undergo a second surgical treatment.