Ankylosis is the abbreviation for cervical ankylosis, which is caused by the compression of the nerve and the restriction of the movement of the neck muscles, which cannot be self-relieved; drop pillow is mostly seen in the morning after waking up, or suddenly the restriction of the neck movement, causing discomfort in the neck and shoulders, which is episodic. If you have a long period of neck discomfort after waking up in the morning, you need to consult a doctor for examination: 1. cervical ankylosis: 1. etiology: mostly seen in various cranio-cerebral pathologies, such as viral meningitis, septic meningitis, increased intracranial pressure, subarachnoid hemorrhage, etc., also seen in cervical pathologies, such as cervical spondylosis, cervical trauma, etc.; 2. symptoms: manifested as restricted muscle activity in the neck, muscle stiffness, pain, especially with a low head, the chin can not be close to the chest. Head bending to the sides is also limited, rotation and backward tilting can be unimpeded. Also may be accompanied by dizziness, nausea, vomiting, weakness, numbness of the upper limbs, feet on cotton feeling and other symptoms. Second, the pillow: 1, cause: mostly due to improper sleep posture, neck cold, or sudden overstretching of the neck muscles in daily life caused by temporary overstretching, strain or excessive muscle retraction spasm; 2, symptoms: can be manifested as the morning after the neck muscle stiffness, soreness, pain, may be left and right rotation of the head is limited, may also be low and backward head is limited, often involving one side of the neck muscles, and This often involves one side of the neck muscles and causes the head to be tilted to the affected side. In addition, morning pillow can be improved by applying heat and massage to improve the symptoms, and it can heal itself within a few days. On the other hand, cervical ankylosis cannot be relieved, and the patient is often morbid and needs to be treated for the cause. This can also help determine the two diseases.