Weird disorders that can occur after a trauma to the head or a stroke include Frégoli syndrome and foreign accent syndrome, according to HowStuffWorks. Weird genetic disorders include hypertrichosis and periodic paralysis. ABC News notes that some people even are allergic to the cold and suffer from a condition known as cold urticaria.
HowStuffWorks explains that Frégoli syndrome causes a person to think that someone he knows has assumed the body of a stranger or has taken on a different appearance. A patient with foreign accent syndrome speaks with a distinct foreign accent. The condition occurs when damaged parts of the brain affect the coordination of the muscles used for speaking. As a result, the disorder alters the way an individual pronounces consonants and vowels.
Hypertrichosis is a condition that leads to the overproduction of hair, says HowStuffWorks. People who suffer from the condition may take on a werewolf type of appearance.
According to HowStuffWorks, periodic paralysis is a genetic condition that results in near-paralysis of the muscles. The condition can be triggered by a sudden noise or the consumption of salt. It affects about one in 100,000 in the population.
According to ABC News, some people actually have an allergy to the cold. The condition, cold urticaria, causes welts and itching in individuals who are exposed to icy winds and snow.