A slipped disc, also called a slipped or ruptured disc, occurs when the soft, gel-like center of a spinal disc pushes through a crack in the tough outer layer. This can irritate nearby nerves, leading to symptoms such as pain, numbness, or weakness in the area supplied by the affected nerve. Individuals with a herniated disc may experience difficulty finding a comfortable sleeping position, as lying down can exacerbate symptoms. Additionally, pain from the herniated disc may worsen at night due to changes in posture or reduced movement, further interfering with sleep quality.