Posterior circulation ischemia is more severe. The condition, if left untreated, may result in serious sequelae such as posterior circulation infarction, brainstem lesions, limb weakness, and speech impairment. Posterior circulation ischemia refers to transient ischemic episodes in the posterior circulation of the brain, also known as ischemia of the vertebrobasilar system. Patients mainly manifest symptoms such as dizziness, headache, numbness of limbs, and transient loss of consciousness. After diagnosis of posterior circulation ischemia, timely treatment is needed to improve blood circulation through intravenous injection of drugs such as tianmuin and hemosiderin injection to reduce symptoms such as dizziness and nausea. Posterior circulation ischemia, if not treated in time, may cause damage to the brain area supplied by blood vessels, resulting in posterior circulation infarction, infarction in the cerebellum area, or infarction in the brain stem area. As well as sequelae such as limb weakness, impaired speech, and sensory impairment. If symptoms such as dizziness, headache, nausea, numbness of limbs occur in life, you should be alert, and it is recommended to consult a doctor in time, and carry out relevant examinations under the guidance of the doctor to clarify the diagnosis.