For symptomatic hemorrhagic transformation, there is usually an aggravation of the original cerebral infarction symptoms or the appearance of new symptoms, which is determined by the site of intracranial hemorrhage and the amount of bleeding, etc. Doctors can mostly detect the disease through regular physical examination, routine head CT or MRI review, but asymptomatic hemorrhagic transformation usually does not show changes in clinical symptoms, so it can only be detected through routine head imaging.