The duration of fever when C-reactive protein is high is related to the degree of fever, individual condition, treatment and other factors, and cannot be generalized. C-reactive protein is an inflammatory reactive protein, and an increase in C-reactive protein often indicates infection, although other systemic diseases may also show elevated C-reactive protein, so this indicator is not specific. If a patient has a fever with elevated C-reactive protein but is doing well and other indicators show no abnormalities, the symptoms will usually resolve in about 3 days, but may recur and need to be monitored closely. If the C-reactive protein is elevated along with changes in neutrophils and white blood cells and inflammatory manifestations in the lungs, the recovery time may take about 7 days. In addition, patients with fever can also take physical cooling measures, pay attention to rest and a light diet. If the fever cannot be reduced by medicine for a long time promptly go to the hospital for testing to clarify the causative factors.