Anorexia is characterized by hyperactivity, moodiness, isolation, insecurity, depression, loneliness, cessation of menstrual cycle, excessive exercise, feel cold even in warm weather, and excessive weight loss. Bulimia is characterized by bingeing a large quantity of food and then purging the food. This disease can have the same consequences as anorexia nervosa. Good nutrition is extremely important in adolescence. Many deficiencies are suffered during adolescence for a number of different reasons.
Some adolescents physically mature earlier of later than average.
When boys mature early they usually are very social, athletic and become involved with the community. At first, there may be more anxiety when sudden pubertal changes take place, especially since more mature looking boys are expected to act more mature. Late maturing boys are considered socially inferior, which may cause problems in adulthood. While maturing early as a boy is an advantage, maturing early as a girl can sometimes be awkward, especially in elementary school. As the girl matures through junior high school, it is easier to cope with her adult looks as she is envied by her peers.