Normal children’s axillary temperature is 36~37°C, 37.5~38°C is low fever. Axillary temperature of 37.3 ° C is not fever, for the body temperature is high, need to rule out the measurement error and pay attention to monitor the body temperature. Children’s underarm temperature measurement refers to dry sweat, the thermometer head end placed deep in the armpit, the patient clamped the upper arm for measurement, 10 minutes after the readings, simple and convenient. The normal value should be 36~37°C, there are fluctuations, 37.5~38°C for low fever, axillary 37.3°C is not a fever, for the body temperature is high. Elevated body temperature in children may be due to physical factors such as exercise, eating, stress, etc. It may also be related to infectious or non-infectious diseases. It should be noted that if the body temperature reaches 37.3℃ only once, the general condition is good, and there is no self-conscious symptom, it does not belong to the morbid state. Children’s underarm temperature of 37.3 ° C, if the child is in motion or eating and other situations, it is best to wait for the child to calm down after the measurement again; at the same time need to check whether the thermometer is not calibrated, etc., to rule out the measurement error, pay attention to monitoring the body temperature, such as the discovery of the body temperature continues to rise, the need for timely medical attention. Children with fever should consult a doctor in time, under the guidance of the doctor for treatment, pay attention to keep warm, should eat a light diet, pay attention to nutritional balance, eat less spicy and stimulating food.