Medical bracelets are worn by people who have medical conditions which need to be known in an emergency. Medical bracelets are typically a metal chain type bracelet with a metal charm attached. The charm typically has a medical alert symbol on one side with the medical condition/s listed on the other. Some companies make medical id bracelets that are more fashionable.
A medical alert bracelet is recommended to be worn when a medical condition is present that may interfere with a treatment or be negatively affected by a typical treatment to someone who does not have the same medical condition. They are worn in the case that the person will not be able to communicate their medical condition to doctors.