Causes of bulging discs include degenerative lumbar spine disease, sedentary lifestyle, inappropriate movements and excessive weight bearing. A bulging disc is due to the fact that the annulus fibrosus of the intervertebral disc is not completely ruptured, and the nucleus pulposus bulges out backward, but is restrained by the annulus fibrosus, because the symptoms are relatively mild, and it is one of the lighter types of herniated discs. There are many causes of bulging discs. 1. Degenerative lesions of the lumbar spine: the intervertebral discs are subject to extrusion, pulling and twisting in daily life, which tends to make the nucleus pulposus of the intervertebral discs, the annulus fibrosus, and the cartilage plate gradually age, and the intervertebral discs lack of blood supply, and the energy for repairing is weakened, which leads to bulging of the intervertebral discs. 2. Sitting for a long time: when the waist is in a flexed position, the pressure in the intervertebral space is high, which is easy to push the nucleus pulposus to the back. In addition, if suddenly rotated, it is easy to induce nucleus pulposus. 3. Inappropriate movements and excessive weight-bearing: prolonged bending, taking high objects, carrying things, carrying heavy objects with one hand and other actions can also trigger lumbar spine injury, resulting in disc bulging. There are many reasons for lumbar disc bulging, most of which are caused by bad habits in daily life. Usually should pay attention to protect the lumbar spine, avoid sitting for a long time, when lifting things, first squatting with the strength of the legs to lift the heavy objects, strengthen the lumbar back muscle exercise, pay attention to warmth and so on.