The occurrence of cold in summer is often caused by cold: first of all, the weather is hot in summer and many people will stay in air-conditioned rooms. The air conditioning room is cooler and it is easy to catch a cold, which can lead to the occurrence of a cold. Secondly, air conditioners are often not cleaned in a timely manner, and there are disease-causing viruses, bacteria, and mold in air conditioners, which can lead to respiratory infections. If the upper respiratory tract infection occurs, that is, the occurrence of the cold. In addition, in the summer, sweating is more, and when sweating, if the wind is blowing, it is also easy to catch a cold, which can easily lead to the occurrence of a cold. So in the summer time must pay attention to the timely replacement of dry clothing, can not stay in the air conditioning room for too long, air conditioning also need to be cleaned up in a timely manner. You must drink more water and eat more fresh fruits and vegetables rich in vitamins when you have a cold. If the symptoms are heavy, you also need to take anti-cold medicine for treatment.