If your child has a hot face or fever, use a thermometer to measure the armpit temperature or anal temperature. If the temperature is not high, it may be because your child is in a closed indoor environment or is wearing too much clothing, and the high outside temperature causes the capillaries to dilate so that the face is red and hot. In this case, you can open the window to let the indoor airflow, or take off excess clothing, face hot, fever will disappear. If this is not the cause, there are some diseases that can also cause redness and burning, such as allergies and eczema. Pay attention to whether your child has been exposed to suspected allergens and check your child’s body for red spots, pimples and related treatments. If there is indeed fever, pay attention to whether the child has a cold or other infectious diseases, you can observe the child’s mental condition, if there is crying, irritability, and accompanied by nausea, vomiting, cough, cough phlegm, nasal congestion, runny nose, it is recommended to go to the hospital for symptomatic treatment.