Rain itself is not toxic, but according to the formation process and environment of rain, it may absorb and carry some substances harmful to human body.

In the process of rainfall formation, it will absorb and carry some harmful substances in the atmosphere, such as particulate matter, sulfide, nitrogen oxides and so on. In addition, if the air is polluted, rainwater may also absorb and carry some harmful chemicals.

Therefore, although rain itself is not toxic, in some cases, it may contain some substances harmful to human body. In order to reduce these potential risks, it is recommended to wear a mask when going out in rainy days and pay attention to cleaning clothes and bodies wet by rain.