Whether a child’s 35°C hypothermia is dangerous needs to be analyzed on a case-by-case basis. The normal body temperature of children is between 36℃ and 37.2℃, and a body temperature of 35℃ is a hypothermic state. If it is caused by more sweating after strenuous activities or taking antipyretic drugs, it is a transient hypothermia, which can gradually return to normal. If it is pathological hypothermia, it is dangerous and may lead to low immunity of children, and the resistance to external bacteria and viruses will be greatly reduced. In addition, hypothermia can also lead to a slowdown in energy metabolism in the body, which does not provide energy to the body properly, inhibiting the function of brain cells and affecting the growth rate, so it needs to be taken seriously. For children with persistent hypothermia that is not relieved, parents should take them to the pediatrician for examination and symptomatic treatment. In daily life, parents should pay attention to keeping the child warm, avoiding hypothermia, enhancing nutrition, and improving immunity through appropriate activities.