People have been exposed to strong electromagnetic fields, which is harmful to their health. It is best to be less exposed to electromagnetic fields. Changes of blood properties under strong magnetic field and its influence on the body. Characteristics of protein polymer under strong magnetic field Influence of strong magnetic field and magnetic field gradient on fibrinolysis process: Effect of strong magnetic field on the activity of animal blood cells and its protective characteristics on myocardium: When the magnetic field passes through human body, it may affect iron molecules in blood. The electric field passing through the skin may cause skin diseases such as eczema. Some people say that women who often use computers are prone to skin aging. Similarly, people realize that electromagnetic waves are more harmful to tissues with rapid cell proliferation, such as blood cells, genitals and lymph, and to children. When the human body is in a strong magnetic field, various magnetic substances in the body will be attracted by magnetic force. At the same time, due to magnetic induction (the object forming a magnetic field magnetizes other objects), magnetization occurs, that is, magnetic objects such as iron (Fe) in red blood cells in the body are attracted or magnetized, thus affecting other magnetic substances. Obviously, this will be harmful to health. If there are magnetic substances in blood or cells, magnetic induction will hinder the normal activities of blood and cells. The accumulation of heavy metals in the body and the susceptibility to magnetic induction give a fatal blow to the body. However, it is difficult to find out the influence of electromagnetic waves on human body scientifically and carefully. Because various environmental factors act on people comprehensively, it is difficult to do long-term follow-up investigation. The influence of electromagnetic waves on human body has been confirmed by epidemiological investigation and animal experiments.