Children with colds and fever at night may be due to reduced activity at night, while taking medication time related. 1. Reduced activity at night: the body temperature during the day is lower than that at night, and children sweat away part of the heat through appropriate activities during the day, so the body temperature is not high. At night, children in the sleep state is not conducive to the body’s heat dissipation, which leads to increased body temperature. 2. Taking medicine time: during the day to take cold and flu medicines can be effective in controlling the rise in body temperature, and to the night time when the effect of the medicine has been over, or before going to bed to take the medicine has not yet taken effect, so there is a rise in body temperature at night. If the temperature is not more than 38.5 °, you can take physical cooling such as warm water towel wipe the whole body, if it is more than 38.5 ° can be oral antipyretic drugs such as ibuprofen suspension. Children’s cold fever at night may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment, the above medication as prescribed by the doctor.