The rash can turn on the air conditioner, the rash usually refers to a class of viral rash that is clinically referred to as rubella, measles, early childhood emergency rash, rose rash, etc., which is self-limiting and can subside on its own. Viral rashes are characterized by corn- to soy-sized macules and papules, bright red in color, usually without itching, and in some patients with mild itching. It is usually accompanied by fever during or before the onset of the disease, and the air conditioning can lower the room temperature. For children with fever, a bright red rash in a cooler environment is more conducive to its remission. However, it is also important to note that the air conditioning temperature should not be adjusted too low, because the low room temperature is not conducive to sweating, which can lower the body temperature of the child and help improve the symptoms of fever.