The clinical manifestations of medullary infarction are usually sudden dizziness, vomiting and nausea. Nystagmus or floating eyeballs can be seen on examination, and there may also be symptoms such as unsteady walking and difficulty in swallowing. The medulla oblongata is located in the brainstem, including respiratory center, sensory center, motor center, circulation center and other parts, generally for the central function abnormality of the relevant obstruction area, patients with medulla oblongata infarction manifested as sudden dizziness, vomiting, intractable nausea, etc., and the examination can see the nystagmus or eyeball floating, and there may be unsteady walking, dysphagia and other symptoms. In addition, some patients may also have sunken eyes, narrow pupils, no sweat on the face, etc. Since the medulla oblongata includes the respiratory center, some patients may also have shortness of breath, respiratory distress, or even respiratory arrest when medullary infarction occurs. Medullary infarction is a critical condition, if the patient has the above symptoms, it is recommended to call 120 immediately and go to the hospital in time to avoid delaying the condition and causing serious consequences.