How to confirm the diagnosis of cerebrovascular spasm? The diagnosis of cerebrovascular spasm is mainly made through the following two ways: first, according to the clinical symptoms of the patient, patients with cerebrovascular spasm usually have headache, dizziness, nausea, vomiting, memory loss, poor sleep and other symptoms, which are the clinical aspects of the diagnosis of cerebrovascular spasm. The second is to do some physical examination, mainly transcranial Doppler, which is the easiest and most objective diagnostic tool to confirm cerebral vasospasm. This kind of transcranial Doppler can indirectly reflect whether the cerebral blood vessels have spasm or not by reflecting the speed of cerebral blood flow and the elasticity of cerebral vessels.