Living in the globally connected world where everyday new technologies are discovered, spaceships are sent to space to find life on other planets, it may seem a little strange to realise that their are still thousands of people living in total isolation from the outside world. They do not use television, gas, advanced vehicles, telephone and other day to day items that we can't live without.
There are more than 200 classified forms of mental illness, some of which you may have heard. Mental illnesses can affect not only the patient but the people around them as well. If not treated cautiously the illness can cause great harm to a number of people. Below is the list of the worst mental illnesses that affects people in horrifying ways.