Can synaesthesia be lost?
As researchers believe that we are all born with synaesthesia and that we lose the connections as we grow, the answer to this is yes. There have also been reports of synaesthetes losing their synsations following a classic blow on the head or after a chemical or organic change to their brain, and some have just said they believe the intensity of their synsations to be getting weaker as they grow older. Amphetamine has also been reported as causing a temporary loss of synaesthesia.