If the patient after lying down will appear waist pain, may be related to the following reasons: 1, there may be lumbar muscle strain. This situation is most common among patients who have been sitting for a long time, such as cab drivers, this type of patients due to long-term sitting and standing, resulting in long-term lumbar muscles in a state of tension, over time will produce muscle strain. This type of patients in sitting, there may be only a slight pain, but once from the sitting position into a lying position, it is possible to feel the lumbar pain, but after a period of rest, the pain will be reduced. 2, there may be fasciitis. If the patient’s waist has some old trauma or cold, then there may be complications of inflammation of the deep fascia, the patient may feel sore in the process of lying down, but the same, after a period of lying down and resting, the pain will be relieved. 3, there may be lumbar vertebral body slipped. This condition may be due to congenital developmental factors or acquired trauma, resulting in a fracture of the isthmus of the vertebral arch, which will then create instability between the vertebrae. When the patient is standing, this instability is not obvious due to muscle tension in the lumbar region, but when the patient is lying down, this instability is aggravated due to relaxation of the lumbar muscles, which in turn causes irritation of the peripheral nerves, resulting in pain.