Sleeping on a hardboard bed back pain consider muscle strain, lumbar disc herniation, lumbar vertebral hyperplasia, osteoporosis and so on. 1. Muscle strain: prolonged work in one position can cause chronic strain on the muscles of the lumbar back, aseptic inflammation occurs, lumbago, appropriate activities can reduce the symptoms of the lumbar region. 2. Lumbar disc herniation: Herniated discs can cause lumbar pain and leg pain and numbness by pressing on the nerves, which can be clearly diagnosed through lumbar MRI. 3. Lumbar spine hyperplasia: lumbar spine bone degeneration, hyperplasia, lumbar spine physiological curvature straightening, when lying flat on a hard bed, lumbar pain, bending activities are limited, X-ray film can be a clear diagnosis. 4. Osteoporosis: the elderly calcium loss of excessive lumbar back pain, supplemental calcium and vitamin D can reduce. Specific medication should be under the guidance of a doctor. Sleeping on a hardboard bed back pain need to go to the hospital to check, for the cause of treatment.