Since the resistance of children is weak, once the phenomenon of 4 consecutive days of fever occurs, the first thing to consider the occurrence of infection-induced fever, you need to give a hematological examination, often abnormal. First of all, we need to check the blood routine and C-reactive protein, the most common is bacterial infection or viral infection, blood routine and C-reactive protein will appear abnormal manifestations, such as the appearance of blood routine in the elevation of white blood cells, accompanied by the elevation of C-reactive protein, it is a bacterial infection caused by the four consecutive days of fever, the need to use antibiotics for treatment. If there is no allergy to penicillin, amoxicillin or amoxicillin clavulanate potassium can be taken. If there is a simple C-reactive protein elevation or blood routine eosinophil elevation, it may be a viral infection caused by children with continuous fever, give the child to take antiviral drugs, drink more water, often the effect is better, you can use the four seasons of antiviral combination.