Sympathetic disorder, also known as synesthesia, is a type of psychiatric disorder, which is relatively rare, and most patients have a mild condition, usually with no physical discomfort and no substantial damage to the body. Synaesthesia is the automatic connection between hearing and taste, for example, when eating delicious food, will hear beautiful music, hear a certain sound in the mouth to produce a variety of taste, hear beautiful music will smell flowers, some people can hear the color and temperature of the music, some people can feel the color and character of the numbers, and some people see the picture and can smell its taste. Although the medical profession considers synesthesia to be a rare psychiatric disorder, it actually has little effect on daily life, and the experience is neutral, even beautiful, and many people look at it as an endowment of the gift of God.