1. Indoor air does not circulate, the space is enclosed, and it is easy to get sick, especially when there is a large temperature difference between outside and inside, alternating between cold and hot, making illness more likely;
2. Easy to catch a cold, especially in summer, the peak season for colds. If children are exposed to air conditioning for a long time, they are prone to colds. Therefore, keep air flowing at home, give children plenty of water, and try to reduce air conditioning usage;
3. Prone to arthritis. Cold air causes significant damage to joints. Without proper warmth, elderly people can easily develop arthritis, and blood circulation becomes poor;
4. Easy to get diarrhea. If the room is too "cold," it can weaken gastrointestinal motility. Coupled with the tendency to seek coolness in summer and frequent consumption of cold drinks, the intestines are controlled by the "cold," resulting in diarrhea.