The reason for this is the following: 1, overworked, such as the patient before sleep to do excessive activities involving the neck, shoulders and back, then in the process of sleep, may continue to cause a group of muscles in one part of the above-mentioned spasm, and then the patient woke up after the pillow. 2, cold, such as the patient in the process of sleep, the neck is cool wind blowing, or contact with a cold object, then it is possible that due to direct cold, leading to muscle spasm in the neck, and then lead to the patient appear pillow. The company’s main business is to provide a wide range of products and services to its customers. The pillow is not suitable, such as pillow pillow is too high, too short, too hard, will accordingly cause the above pathological changes, and then lead to the pillow.