I said a method of maintenance at night-pay attention to other times. At night, you can use the inclined bed mattress to correct the cervical vertebra for several hours, for example, two hours, then use the inclined bed for one hour before getting up in the morning, and put its own pillow as an ordinary mattress at other times. This can correct the cervical and lumbar vertebrae well. This is a new spine maintenance method, please refer to it!