There are two main reasons for feeling that the neck can not support the head: First, due to strains or strain on the muscles around the neck, and often due to cold leading to the formation of local aseptic inflammatory lesions, after the formation of lesions in the neck when the muscle contraction will feel more pain, resulting in a decrease in muscle strength, so it will feel that the neck can not support the head, especially when the head is lowered or tilted, left and right activities. When the force is greater, resulting in more obvious pulling, there will be pain aggravation, this symptom will be further aggravated. Second, due to wear cervical brace for cervical spine parts fixed for too long, such as cervical spine injury must wear a cervical brace for fixed, fixed for a long time the muscles of the neck position will appear muscle atrophy, the strength will decline, therefore, will feel the support of the head decreased, the above symptoms.