The accuracy of online symptom checkers is highly variable because an accurate diagnosis depends on the nature of the health condition with which the symptoms are associated. A consultation with a medical professional can help to confirm or discard a diagnosis through evaluation and testing, says The Wall Street Journal.
Online symptom checkers can offer a wealth of information on potential causes for the presented symptoms, explains Doc Response. However, this glut of information common to online symptom checkers can introduce the possibility of those symptoms being associated by the checker with serious or rare conditions. Therefore, if and when a patient decides to consult with a medical professional, this excessive information can lower the accuracy of the online symptom checker.