Subacute subdural hematomas are generally not termed late, and small numbers of subacute subdural hematomas are not necessarily serious and need to be analyzed on a case-by-case basis. Subacute subdural hematoma generally refers to subdural hemorrhage that occurs within three days to three weeks after injury, and is commonly caused by trauma. A small number of subacute subdural hematomas are rarely life-threatening and are generally not serious if there is no obvious discomfort, such as obvious dizziness or drowsiness, and CT shows no secondary bleeding. However, if a patient with subacute subdural hematoma has a more serious condition, has hypertensive disorders of his or her own or has another traumatic brain injury and develops a sustained increase in intracranial pressure, there may be serious consequences, including the development of coma, cerebral herniation, and impaired cognitive function. If head trauma occurs in daily life, it is recommended to seek medical treatment in time, and actively treat under the guidance of the doctor, so as not to delay the condition.