What are the effects of static electricity on the human body

In dry spring, when you take off sweaters, woolen or nylon, polyester chemical fiber clothing, and pull up the duvet cover from the bed, you will hear a "crackling" sound, and at night, you can also see flickering sparks. Moreover, when your fingers touch metal objects such as door handles, faucets, and chair backs, there will be a sense of electric shock; Wearing synthetic fiber clothes while walking on the carpet, there is also a tingling sensation of electric shock; Chemical fiber factory workers also experience electric shock when touching the spinning thread with their hands, which are common static electricity phenomena in daily life.
Friction between two different objects can cause electricity, and even dry air and clothing can cause electricity. The electricity generated by friction can quickly flow and be lost on conductive objects, while on non-conductive insulators such as chemical fibers and woolen fabrics, static electricity forms and accumulates. When a certain voltage is reached, discharge occurs, making noise and sparks. In short, dry air, low water molecules, and poor conductivity are the conditions for generating static electricity. Static electricity has many hazards, such as interference with automatic instruments and electronic components; Sparks generated by chemical fiber discharge in the chemical and textile sectors can ignite flammable gases (such as acetylene) and flammable liquid vapors (such as gasoline vapor), causing a fire; In the sky, the aircraft becomes electrically charged due to friction with air, moisture, dust, etc., which can seriously disrupt the aircraft's radio communication and cause it to become lost; In pharmaceutical factories, static electricity adsorbs dust, resulting in impure drugs and affecting quality; In sterile and dust-free biochemical laboratories and hospitals, electrostatic adsorption of dust also has adverse effects; In a printing factory, static electricity can cause paper to bond together and make it difficult to separate, resulting in printing difficulties; When watching TV, the static electricity on the fluorescent screen adsorbs dust and oil, forming a layer of dust film, greatly reducing the clarity and brightness of the TV image; In coal mines, static electricity can cause gas explosions, which can lead to serious personal injury and mine scrapping accidents.
According to tests, static electricity also poses a certain degree of harm to the human body. When the electrostatic voltage reaches 2000 volts, your fingers will feel it; Sparks appear when the voltage exceeds 3000 volts, and there is a needle like pain in the fingers; When the voltage exceeds 7000 volts, people feel an electric shock. In daily life, the static voltage generated can sometimes reach tens of thousands of volts, but due to the extremely short time of friction electrification, the amount of current generated is also very small, so it generally does not pose a risk to human life. However, on medical operating tables, electrostatic sparks can cause the explosion of anesthetics, which can harm medical staff and patients, and attention must be paid. Moreover, the large amount of dust adsorbed by static electricity contains various viruses, bacteria, and harmful substances, which are harmful to human health. Severe static electricity can cause skin spots and inflammation, and can also cause irritability, dizziness, chest tightness, nasopharynx discomfort, and even cause tracheitis, asthma, and arrhythmia.
Static electricity poses many hazards to people, but it also has many benefits. For example, people have used static electricity technology in industrial and agricultural production and life, such as dust removal, printing, spraying, flocking, sorting, desalination of seawater, pesticide spraying, artificial rainfall, low-temperature freezing, spacecraft feeding, etc. The simple way to eliminate the harm of static electricity is to