A personal health record (PHR) is like a book of your own medical information. It includes all of the important information about your health, such as your past medical conditions, illnesses, allergies, medications, and test results. Your health care provider, like a doctor or nurse, can use this information to help treat you. Having your own PHR will help your doctor and other health care professionals give you the best care possible. It will help them to know your health history, so they know what treatments to recommend. It will also help them to track your health over time, so they can compare your health now to how it was in the past.