L1 and L2 refer to the 1st and 2nd lumbar vertebral segments. Unilateral L1 and L2 transverse process fractures are located on one side of the lumbar region, while bilateral fractures are located on both sides of the lumbar region. The transverse processes are important anatomical structures of the vertebrae of the spine, one on each side, formed by the extension of the arch of the vertebrae toward the posterior exterior of the spine, and are the site of attachment of many tendons and ligaments. Fractures of the transverse process of the lumbar vertebrae are often seen in more serious traumatic injuries, such as violent blows, falls, car accidents, etc. After the injury, the patient will suffer from lumbar pain, swelling, and limited mobility, etc. However, simple fractures of the transverse process will not affect the stability of the spine, and it is rare to see damage to the neighboring nerves, so conservative treatment is often taken, wearing a waist cuff, and resting for a period of time can be restorative. Patients with lumbar spine trauma are recommended to take X-ray or CT examination to clarify the injury, if only transverse process fracture need not worry too much, if found that the lumbar vertebral body or accessory serious fracture should be treated in time, and if necessary, surgery is also needed.