I don't know if you are talking about static phenomenon, such as being electrocuted by the door handle when opening the door, or being electrocuted when standing close to people. We all know the principle of triboelectrification. Even airflow can cause triboelectrification. But there is a little water vapor in the air at ordinary times, which can take away the charges on the surface of objects and neutralize different charges. But when it is dry (for example, in winter), because there is little water vapor in the air, the static electricity generated by objects can't be taken away (your body will also carry static electricity). At this time, if you come into contact with an object with different charges, electric neutralization will occur, which is "charged" Although people can feel this kind of electric shock, it is still safe. On the contrary, if a person can't release the static electricity carried by his body and make the charge accumulate more and more, it will affect his health.