Herniated lumbar discs become more and more painful after lying down, which may be caused by the mattress being too hard or too soft. 1. Mattress is too hard: when the mattress is too hard, due to the small point of impact, it can lead to the patient’s muscles in a constant state of tension. Prolonged muscle tension can easily exacerbate the rupture of the patient’s annulus fibrosus, making the symptoms of lumbar disc herniation more serious. 2. Mattress is too soft: when the mattress is too soft, due to the uneven force on the patient’s waist, resulting in increased tension in the lumbar muscles and ligaments, causing the patient’s pain. It is recommended that patients choose a suitable mattress under the guidance of a doctor and follow the doctor’s instructions to lie down and rest. If the pain is seriously aggravated, it is recommended that the patient consult a doctor in time to check the cause of the disease, and targeted treatment.