When you have low back pain, you can choose to bend the hip and knee side lying position or bend the hip and knee flat lying position. Acute idiopathic low back pain or acute attack of chronic low back pain should be bed rest, so you can choose to bend the hip and knee side lying position, or bend the hip and knee lying position (lying on the back of the double calf cushion high, under the neck with a small pillow to make the neck slightly forward, or bend the hip and knee feet flat on the bed, or hands holding the knee to make the thighs close to the chest), so that the lower back to relax, relieve pain. Lying position can choose a hard board bed, padded with soft and hard moderate cushion, large soft bed will be shaken because of the position change, make the symptoms worse, so it is not suitable for use. If the pain is severe and cannot be relieved by rest, please consult a doctor for active treatment.