A tongue examination is a simple procedure that helps doctors assess a person's overall health. During this examination, the doctor looks at the color, texture, and shape of the tongue. Changes in these characteristics can indicate various health issues, such as nutritional deficiencies or infections. To perform a tongue examination, the doctor may ask the patient to stick out their tongue and may use a light to get a better view. This quick check can provide valuable information about the body's condition and is often part of a routine physical examination.