Patients with a herniated lumbar disc should try not to bend during an attack, as bending at this time may cause the following adverse effects. First, bending at this time may aggravate the herniation. When bending over, the adjacent lumbar vertebrae will produce shearing force between them, and patients can simply understand that bending over may lead to increased extrusion of the disc by the vertebrae on both sides, which may cause the already herniated nucleus pulposus to become more prominent. Second, the herniated nucleus pulposus may cause more serious compression and stimulation of the surrounding nerve roots when bending over, which will aggravate the symptoms. Thirdly, the process of bending over may lead to the aggravation of other lesions complicated by the herniated lumbar disc, such as the patient may have more serious lumbar muscle spasm. After thorough treatment to get symptom relief, you can do the bending type of movement, but then you must follow the doctor’s guidance.