1. Use a metal bar with a moderate length in the pillow and connect two end plates at both ends to cover an open cavity formed by the pillowcase.

2. The metal rod is arched, or one end is threaded, or both ends are respectively threaded, and the panels at both ends are made of hard materials into semicircles, circles, ellipses, squares or rectangles with the same size and shape. Short round tubes and nuts matched with the two ends of the metal rod are embedded in the center of the two end panels.

3, pillowcases can be made of cloth or bamboo, rattan, plastic, etc.

4. When the metal rod in the pillow is rotated, the two end plates are close to or separated from each other, so that the pillowcase can be tightened or loosened, thereby adjusting the elasticity and height of the pillow. Chinese herbal medicines are added into the pillow to form a medicated pillow and a fragrant pillow.