Wearing a silver bracelet with a black wrist does not mean that the body has cancer, it may be caused by the material of the silver bracelet that leads to the penetration of oxidized silver into the surface layer of the skin. The layer of oxidized silver on the surface of the silver bracelet can easily penetrate into the surface layer of the skin, thus forming deposits and causing the blackening of the wrist. If the silver content of the silver bracelet is impure, it may also cause other metal oxides to enter the skin tissues and cause the wrist to appear black in appearance. Therefore, wearing a silver bracelet wrist black is not a hint that the body has cancer, belongs to a normal chemical reaction. It should be noted that wearing a silver bracelet is harmless to the human body, but there is no great therapeutic effect, although the silver ions do have a certain bactericidal effect, but the bactericidal effect of the silver bracelet is very weak, because the elemental silver release of silver ions is very weak, almost negligible. It is recommended that any physical discomfort should be dealt with in a timely manner by a doctor, do not believe in any claims of prescription cures.