Dizziness and sinking of the back of the head: First, the most common clinical cause is posterior circulation ischemia. Generally, it mainly refers to the slowing down of blood flow in both vertebral or basilar arteries, resulting in symptoms of ischemia in the brainstem or cerebellum of the patient, which can lead to dizziness and sinking of the posterior head, and in severe cases, walking deviation. Generally, patients can be given treatment to improve circulation and antiplatelet aggregation. Secondly, dizziness and sinking of the back of the head can also be seen in cervical spondylosis. Due to the herniated disc in cervical spondylosis, the nerve roots of the dural sac can be compressed and the muscles of the patient’s posterior occipital region can become spastic, which can also affect the blood supply of the vertebral artery in severe cases. Patients with cervical spondylosis can generally experience dizziness and dullness in the back of the head, and in severe cases, numbness of both upper limbs. Thirdly, dizziness and sinking of the posterior head should also be ruled out as an occupancy of the posterior circulation, especially since the onset of this occupancy is relatively insidious and the development is also slow, and the patient can have sinking of the posterior occipital region. Generally, the diagnosis can be confirmed by CT or MRI of the head.