For infants whose temperature is below 38.5℃ during fever, the fastest and most effective way to lower the temperature physically is warm water bath to lower the temperature, rehydration fluids to lower the temperature, etc.; if the temperature is above 38.5℃, it is recommended to consult a doctor in time. 1. Warm water bath to cool down the whole body or soak in a warm bath: parents are advised to take about 28-32 ℃ warm water, soft towel dipped in wet to wipe the whole body, especially the large blood vessels flow through the parts to be wiped, such as the armpits, groin, and the neck and so on. However, it is important to avoid wiping the chest, abdomen and soles of the feet, so as not to cause reflexive slowing of the heartbeat or cardiac arrest. You can also give your baby a warm bath to help him or her cool down quickly, but be careful to keep him or her warm during the wiping or bathing process, so as not to aggravate the symptoms of elevated body temperature by catching a cold. 2. Replenish fluids: Parents should give infants more warm water to replenish body fluids and promote metabolism and excretion, which will help infants cool down as soon as possible. Parents are advised to strictly monitor the baby’s temperature changes, and seek medical attention if the condition persists without relief to avoid delay.