Synesthesia

The synesthesia, in neurophysiology, it's the joint assimilation or interference of various types of sensations of different senses of the same perceptual act. In simple words, synesthesia could let you smell colors, taste an image, etc...

The main characteristics of this illnes are the the cross perception and association, for example, there is a case of a man that every letter "A" that he read, he saw it read, no matter what color the "A" had, he sees her red. But this is only the "color synesthesia", becuase  there are other types of synesthesia, like the temporary one, produced by hallucinogenic drugs, or the "taste synesthesia", that, how his name says, allows you to feel some flavour when shou shouldn't. Also, exists another clasification for the synesthetes, the superior synesthetes and the lower synesthetics, clasification based on wich part of the brain is the anomalo gene (yes, the people who have synesthesia since they birth  have it for an anomalo gene, commonly heredated by parents)

How many persons are affected remain uncertain, but it's known that affect mainly autistic people.

Actually there are no treatement to control it, because isn't a big problem, the people affected by some kind of synesthesia says that it's another way to "see" the world.

As I said previously, have synesthesia isn't a big problem, because it doesn't affect significantly in how you work, how are your relations, you social life, or family.