Traditional Chinese medicine believes that magnetite is a mineral Chinese medicine with a long history of blind application, which comes from oxide spinel mineral magnetite. Known as "Xuan Shi" and listed as a China product, it has been used for about 2000 years. Magnets have the ability to absorb iron. The stronger the iron absorption, the better the medicine. Its nature is pungent, salty and cold. After the liver, heart and kidney meridians are damaged, qi and blood stagnate and the meridians are blocked, resulting in pain and congestion leading to swelling. The regulation of magnetic field can dredge meridians and qi and blood, and make the whole body qi and blood unobstructed. The internal organs are full of vitality. From the point of view of western medicine, the mechanism of magnetic therapy is to produce biological effect and therapeutic effect through the influence of magnetic field on the distribution of bioelectric current, the motion state of charge and the magnetic distance orientation of biopolymer in the body. Some studies also believe that acupuncture points in the human body have electromagnetic characteristics. It is the convergence point of magnetic field, and meridians are the main channels to realize biomagnification effect. The imbalance of biological charge in human body will lead to some diseases. Therefore, real magnet collars and bracelets can relax muscles and promote blood circulation. However, most fakes on the market now should be carefully purchased.