Dullness in the back of the head can be caused by cerebrovascular disease, which is mostly caused by ischemia in the posterior circulation. The posterior circulation mainly refers to the double vertebral and basilar arteries, which can supply blood to the brainstem and cerebellum. Patients with posterior circulation ischemia may experience dullness and swelling at the back of the head, dizziness, and in severe cases, nausea and vomiting, as well as numbness and weakness of the limbs. For posterior circulation ischemia, patients are advised to improve circulation, activate blood circulation and remove blood stasis, and if necessary, aspirin can be given orally as an anti-platelet aggregation. Dullness at the back of the head can also be seen in cervical spondylosis. Due to the herniation of the cervical intervertebral disc that causes the dural sac or nerve roots to be compressed, muscle tension at the back of the head and neck can occur, which can lead to dullness at the back of the head, accompanied by numbness and weakness of the hands, etc. If necessary, CT or MRI of the cervical intervertebral disc can be checked. The treatment can be traction, acupuncture, massage and other symptomatic treatment.