In the early days, we used mostly mercury thermometers. You can use the mercury thermometer to measure the temperature from your mouth or underarm when you have a fever. But with the development of technology, digital thermometers gradually began to become popular, and also you can use the digital thermometer for fever, Mercury thermometer and a digital thermometer, which one is better?This article will help you to find the advantages of a digital thermometer compared with a mercury thermometer.