I wear a medical id bracelet whenever I go out of the house because I have dysautonomia w/ severe low blood pressure problems and am a faint/ fall risk, and I also cannot be given any kind of local or general anesthesia. I wear one in case I faint or have an accident and become unconscious, while I am outside. It has my name and the phone number for my emergency contact person. As well as "faint/ fall risk, severe low blood pressure, no anesthesia, see phone for meds". Then I have a full listing of allergies and medicines, as well as important info about my condition on the "in case of emergency" info section of my cell phone. Those medical id bracelets are small and you cannot fit much writing on them....so I would limit it to things that are of life and death importance. Like a severe allergy that you have anaphalactic reactions to (and you may carry an epi pen for), also asthma, and any medication or condition that you have that might cause a severe negative reaction to emergency treatment or medicine that might be administered while you might be unconscious. This is important for asthma and severe allergies because during an asthma attack or anaphalactic reaction, you might not be able to talk... and someone could help you access any medicine you carry with you. It is also important for emergency responders to know that information, so they can determine more quickly what is going on with you, and how best to help/ treat you, when you are unable to tell them yourself. Whatever you cannot fit on the id bracelet, you can put on a card in your wallet, and in the emergency section of your phone..... and hope that people will read it. That is what concerns me... Will they look for an id and read the info in the event of an emergency? One can only hope so.