. Because of the weather, too hot, need to open the air conditioning, the need to blow the fan; small children can not sit at home, like to run around inside and outside the house, a little hot and a little cold, small children’s ability to adapt to the good, will not be sick, not good, it is easy to get sick. 2. Because of dietary reasons, the heat, people like to eat cold drinks, small children see Eat will not be good, easy to fever, tonsillitis; do not eat columns is not good, for fear of others said not to be able to. Eat fruits such as: watermelon, pears, grapes, mango, etc., easy to diarrhea disease, atopic dermatitis, etc. 3. Personal habits, is the summer vacation, many children on vacation, change the original habits, leave the original living environment, there is a process of adaptation, tolerated, no problem, intolerance is easy to get sick Oh.