I also have chronic pharyngitis. I used to cough badly as soon as I inhaled hard after swimming. Later, my swimming teacher told me that this is because some swimming pools contain chlorine (chlorine is a halogen chemical element, the chemical symbol is Cl, and the atomic number is 17). The simple substance of chlorine at room temperature is chlorine, which is a light green toxic gas, Cl2, consisting of two chlorine atoms. ) is irritating to the respiratory tract. Then I changed the swimming place, and it was fine.

This gym may be decorated with non-environmental protection materials, which will cause harmful gases in the air and stimulate your respiratory tract. Besides, you have chronic pharyngitis, so you cough.

Don't go there again. It seems that MCA was poisoned by poison gas in the fitness center. . .