Why is it easy to catch a cold when the weather is cold?

In many places in China, colds are called "catching cold", which shows that colds are closely related to weather conditions. Colds occur all year round, especially in winter and spring, because influenza viruses are easy to parasitize in low temperature and dry cold environment. Chinese medicine also believes that when the climate changes suddenly and the temperature is abnormal, the wind pathogen virus is most likely to attack the human body.

Clinical practice also shows that whenever there is a "sudden change in weather", the number of people who catch a cold is often the same.

Then it suddenly increased. "Sudden weather change" is mainly manifested in the drastic changes of meteorological factors such as temperature, air pressure, precipitation, wind and humidity, which are generally brought by the frontal weather system (frontal surface, that is, the interface between cold air and warm air mass), especially in winter and spring, when the cold air in the north moves southward from time to time, the frontal activity is more frequent, which often induces colds or other diseases.

People's cold symptoms will be different in different seasons. The so-called "four-season colds" are wind-cold colds (caused by cold in winter or cooling in spring), wind-heat colds (caused by high temperature in spring or rising temperature in autumn and winter), wet cold or summer colds (caused by high humidity and high temperature in summer) and dry colds (caused by dry air in autumn). Among them, the first two cold symptoms are common headache, fever, stuffy nose and runny nose, while the third cold is often accompanied by chest tightness and joint pain, while the dry-hot cold is generally accompanied by dry nose, dry throat, cough with no or little phlegm, thirst and red tongue.

Therefore, "conforming to nature" should be the first principle to follow in preventing colds. Specifically, it is necessary to pay attention to listening to and watching weather forecast programs on the premise of being familiar with the laws of local weather and climate change. When the weather changes suddenly, it is necessary to change clothes and quilts in time and keep warm to prevent colds and colds. In one or two days after the sudden change of weather, you should go to public places as little as possible to prevent colds.

Sometimes it's cold and sometimes it's hot, plus people's poor physique and low resistance, so it's easy to catch a cold.