The alternation of fall, winter, spring and winter is easy to catch a cold with temperature changes, poor resistance, allergies and other factors. 1. Temperature changes: the temperature changes in the fall, winter, spring and winter, especially in the morning and evening, the temperature difference is relatively large, if you do not do a good job in a timely manner to prevent cold and keep warm, by the impact of temperature changes in the human body is easy to catch a cold. 2. Poor resistance: the alternation of fall, winter, spring and winter is also easy to catch a cold with the poor immunity of the human body. Due to the relatively low immunity, in the fall, winter, spring and winter alternation when the body is stimulated by the temperature, it is easy to change and catch a cold. 3. Allergies: Colds in the fall, winter, spring and winter can also be related to allergies. In the fall, winter, spring and winter, there are more pollen, dust and other allergic substances in the air, which leads to allergies in the human body, which can lead to colds and allergies. If you are prone to catching a cold in the alternation of fall, winter, spring and winter, you need to pay attention to improving your body’s resistance and increasing or decreasing your clothes according to the temperature difference. If you already have a cold, remember to go to a regular hospital in time.