The danger period of acute cerebral thrombosis is related to the severity of the disease, and may be about 1 week after the onset of the disease in mild cases, or about 2 weeks or more in severe cases. When patients with acute cerebral thrombosis, infarct size is small, symptoms are relatively mild, and patients without complications are generally considered to have passed the danger period after 1 week. For patients with large infarcts and severe symptoms, the danger period is generally considered to be over in about 2 weeks, but for patients with complications such as lung infections and cardiac insufficiency, the danger period may be even longer and is related to the control of the disease. Patients with acute cerebral infarction should seek medical treatment in a timely manner, and the duration of the danger period varies depending on the condition of the patient. It is recommended to follow the physician’s treatment, and consult the patient’s attending physician as to whether or not the patient has passed the danger period.