Lumbar disc freeing is a condition in which the nucleus pulposus tissue of a herniated lumbar disc falls out of its original position in the spinal canal, thereby producing corresponding compression at other locations, i.e., the nucleus pulposus of the herniated disc prolapses and becomes free. This condition usually produces severe symptoms, such as severe radiating pain in the lower extremities and severe back pain. Patients are often unable to lie down, and when they do, they experience severe pain, which seriously affects their sleep and rest. This condition usually requires surgery to relieve the compression, and when the doctor examines the patient and reads the film, there may be symptoms and signs that do not match, and this should be considered when there may be a prolapsed or free lumbar disc. Generally, MRI can be used for further examination to clarify whether this condition has occurred. In short, lumbar disc prolapse and free disc often produce serious symptoms and in severe cases even affect the function of the second stool, which usually requires surgery.