Why is there static electricity in cold weather?

In the dry season, when people open the window and open the door, their fingers often tingle, which is the performance of human body releasing static electricity.

Research shows that the human body generally needs two conditions to generate static electricity: dry air and non-conductive chemical fiber clothing. If the air is dry and the relative humidity is less than 40%, the skin surface will be abnormally dry, the resistance value will increase, and a large amount of charge will accumulate in local skin. If you wear chemical fiber clothes, the charge is not easy to export. When your fingers touch the metal conductor, the human static electricity will suddenly be released, and your fingers will feel electric shock.

How to avoid and reduce the harm of static electricity to the body? Generally, we can start from the following aspects: increasing indoor air humidity and using humidifier on dry sunny days are the best way; It is best not to choose carpets made of chemical fiber and furniture made of plastic as surface materials indoors; Household appliances such as televisions, air conditioners and computers should be grounded; Try not to wear chemical fiber clothing in winter, and choose cotton or silk clothing.