In clinical practice, fever typically occurs 24-48 hours after the onset of acute cerebral infarction, with body temperature rising to around 100.4°F (38°C), and usually returns to normal within one week.
The possible causes of fever include the following:
1. Central fever may result from the impact of cerebral infarction on the brain's thermoregulatory center.
2. Concurrent infection, where body temperature is normal at the onset of cerebral infarction but gradually increases, presenting as a remittent fever, with temperatures potentially exceeding 102.2°F (39°C). Clear evidence of infection is present, commonly in the lungs and urinary system.
3. Absorption fever may occur due to the body's absorption of blood, particularly in cases of large-scale infarction or secondary hemorrhage following cerebral infarction.