The pain often develops during the night and is felt more strongly upon rising. Disks A herniated or slipped disk occurs when the gelatinous center of the disk is ruptured due to strain, causing the disk to lose its cushioning effect and the nerves of the spinal cord to be pinched. A herniated disk produces sudden and sharp pain from any kind of exertion even sneezing or coughing can cause pain. The pain shoots down the back and leg and into the calf and foot. An inactive lifestyle or poor physical condition.
Weak muscles leave one susceptible to strains and sprains of the muscles, tendons, and ligaments.
Heavy labor frequently contributes to back injury as it can put undue stress on the muscles, ligaments and discs. Obesity increases the load on the lower back, especially when a person is more that 50 pounds over their ideal body weight. Improper diet can contribute to weakness of the spine. Psychological stress can increase tightness and inflexibility of the back. Improper ergonomics such as chairs, tables, mattresses etc.