When a baby has a fever, if the hands are hot and the feet are cold, it means that the body temperature is still in the rising period. Because the blood circulation in the feet is poorer and farther away from the heart, the feet will be cooler when the body temperature is on the rise. At this time, you should rub your baby’s feet hot or soak them in hot water to promote circulation, which can help reduce fever, or you can also take a warm bath. In addition, if the feet are very cold, you need to combine the baby’s mental condition as well as the circulation condition. If the baby’s blood circulation feels poor, the skin color is not good and the face is not good, you should immediately send to the hospital for consultation.