There are over 80 different types of synesthesia described by science. Synesthesia means to blend the 5 senses. Examples or synesthesia are seeing sounds in colors or touching smells.

How many types of synesthesia exist?

There are at least 80 types of synesthesia.

What is the rarest form of synesthesia?

1. Lexical-gustatory synesthesia. One of the rarest types of synesthesia, in which people have associations between words and tastes. Experienced by less than 0.2% of the population, people with this may find conversations cause a flow of tastes across their tongue.