Skeletal muscles are the primary cause of back spasms, and these tend to occur due to electrolyte abnormalities and dehydration. Smooth muscles located within the walls of hollow organs can also cause spasms.
Back spasms caused by skeletal muscles usually occur suddenly, and it's painful and short-lived. When the spine curves irregularly, it affects the skeletal muscles, leading to pain. Continuous heavy lifting tends to strain the back muscles, causing painful muscles spasms, especially in people with a poor physical condition. Patients can avoid muscles spasms by engaging in physical exercises to improve muscle strength and stability. Additionally, losing excess weight is also essential in preventing spasms.