Signs of disease written on your face

Face-to-face communication is very important in human interactions because it gives the other person a chance to read your facial expressions. Just by looking at a person’s facial expressions when you talk, you can deduce if they’re happy, angry, sad, disgusted, afraid and so on. Facial expressions which can occur as fast as 1/15 or 1/25 of a second, are a great indicator of what someone’s emotions. 

Similarly, when you go to the doctor, they partly rely on your face to arrive at a diagnosis. Certain symptoms might manifest on your face which may give your doctor vital clues about underlying health conditions.