Cervical spine has no strength head can not stand up, may be cervical spondylosis, neck muscle strain, neck trauma and so on. 1. Cervical spondylosis: after the cervical spine degenerative lesions, it will produce pressure on the surrounding tissues and nerves, which will make the local related areas have numbness, weakness and other symptoms, resulting in the head can not stand up. 2. Neck muscle strain: prolonged low head work will lead to neck muscle strain, resulting in neck muscle blood circulation, malnutrition, thus triggering the situation. 3. Neck trauma: If the neck is hit by external force or suddenly falls and injures the neck, it may lead to damage to the neck muscles, ligaments and other soft tissues, thus causing neck weakness and inability to support the head. In order to promote the recovery of the symptoms of cervical spine weakness and inability to support the head as early as possible, it is recommended to go to the hospital in time to seek medical treatment, and carry out professional and targeted treatment after a clear diagnosis.