Lumbar tightness after lumbar disc herniation is considered to be caused by aggravation of the condition leading to nerve compression, or due to aggravation of the condition caused by calcification of lumbar intervertebral discs, lumbar intervertebral disc adhesion and so on. 1. Nerve compression: lumbar disc herniation is easy to increase the burden on the lumbar spine, if the condition continues to progress without timely treatment, resulting in peripheral nerve compression, easy to cause tightness, and accompanied by obvious lumbar acidity, lumbago, buttock pain, and radiating pain in the lower limbs. 2. Calcification of lumbar intervertebral disc: it is a complication of lumbar intervertebral disc herniation. Further aggravation of the condition will lead to calcification of the nucleus pulposus and cartilage, which will result in a feeling of tightness. 3. Lumbar disc adhesion: when lumbar disc herniation reaches a certain level, adhesion will occur locally, if the adhesion is not broken down in time, there will be obvious tightness and the degree of compression on the nerve root will be obviously aggravated. Lumbar disc herniation patients with tightness can also be seen in other reasons, it is recommended to clarify the cause of the disease, and actively carry out regular treatment, can effectively control the progress of the disease.