But the government agency warns these thermometers … Fever is a symptom of an illness but not an illness itself. The thermometer’s screen also lights up green for a normal temperature, yellow for a raised temperature and red for a fever. Body temperature is accurately measured with a thermometer. The FDA says these infrared thermometers are a pretty effective way to check someone’s skin temperature while maintaining social distancing. Meat thermometers come in digital and analog models, in a … Most of the best meat thermometers run under $25 and they will get your food cooked right and kept at a safe temperature. Taking your temperature orally is the most effective method for adults, according to internal medicine specialist Michelle N. Brooks, MD, an assistant professor and academic hospitalist at VCU Health.. How to use digital thermometer for fever. It features a pre-warmed ear probe for increased comfort and … You need to use a thermometer to find out if you have a fever and how serious it is. Your doctor or pediatrician will ask you for this information when you call. Fever is the body’s way of reacting to help fight the illness. Oral thermometers … One of the easiest ways to take your temperature is to use a digital thermometer. The best thermometers to check for fevers. Your child’s discomfort and the illness causing the fever is often more of a concern than the high-temperature reading. Oral digital thermometers use electronic heat sensors to measure your body temperature. Having a temperature is indicative of an infection or an illness your body is trying to fight off.