Which is accurate ear or oral temp? my ear is always 99.6 -100.4 and orally it will only be 98.5?

Temperature: Probably the most accurate way to check your temp is with a rectal thermometer. In general, oral temp is more accurate than ear temp, but each can be altered. Eating or drinking hot or cold foods can change oral temp. Ear thermometers measure infrared energy from the eardrum. Ear infections or a history of ear tubes may cause scarring, cold outdoor air exposure may make ear temp seem lower.