At the age of 18, some of the symptoms of autism, there are some symptoms that may appear: 1, the performance of particularly withdrawn and unwilling to communicate with others, every day alone at home, unwilling to go out. 2, unwilling to communicate with their classmates, when their families, parents, classmates and their own chatting when they are not willing to talk to them, or even afraid of others to see themselves. When relatives come to their home, they avoid seeing them. Even in the school and activities show particularly withdrawn, not willing to have interpersonal relations with others, no friends, and in serious cases even easily become more and more introverted and sensitive.