Cough at night is more severe than during the day, which is seen in many diseases, mainly in the inflammatory changes of respiratory system. As the body's resistance drops, it is invaded by pathogens or stimulated by allergens, which leads to congestion, edema, exudation of inflammatory substances in respiratory mucosa, and even contraction and spasm of bronchial smooth muscle, thus causing cough. At the same time, when people lie flat at night, some secretions in the respiratory tract will flow back to the throat, causing irritating cough. At night, the sympathetic nerve of the human body is more excited than during the day, which tends to make the glands secrete too much and aggravate the exudation of inflammatory secretions in the respiratory tract, so these factors lead to a worse cough at night than during the day.

At night, the lungs should be detoxified

Many people will have this situation. For example, some people often wait until they go to sleep at night to cough badly, especially in the early hours of the morning. In fact, at this time, the lungs are cleaning up some toxic garbage in our bodies, so it is very likely that they will detoxify by coughing. In fact, this is also a manifestation of self-defense.

2. Qi and blood are moving to lung meridian.

At one o'clock in the morning or at three o'clock every day, at this time, the qi and blood flow to the lung meridian, so some people may have a very serious cough at this time. At this time, our lungs are also repairing themselves, so this is a very normal physiological phenomenon, which means that there are relatively many toxins in the lungs, so we can eat more food that can clean the lungs in our daily life.

3. The sleeping environment is dry and not circulating

If you cough at night, it can be said that it is very serious, and there may be some external environment, so the air is relatively dry, and many people may close the windows when they need it, so the indoor air will become very long, so the respiratory system of the lungs will be bad at this time, so it is very likely that cough will occur. Then it is best to leave a small slit when sleeping at night, so that it can play a very good role.