When a lumbar disc is herniated, there is no restriction on sleeping position, left, right, or flat position are all possible, but only if the patient needs to sleep on a hard bed. In the 1960s, 70%-80% of patients could be cured by conservative treatment, but they had to sleep in a hard bed for at least 2-3 months. The reason is that after sleeping on a hard bed, the whole spine is free from longitudinal pressure and can be relaxed, which makes it possible to separate the intervertebral discs from the nerves and thus reduce the symptoms. In addition, cold should be avoided in life, and treatment such as minimally invasive surgery is available when conditions allow.