In addition to feelings, it can change behavior, physical health and appearance, academic performance, social activity and the ability to handle everyday decisions and pressures. We don't know all the causes of depression yet, but there seems to be biological and emotional factors that may increase the likelihood that an individual will develop a depressive disorder. Difficult life experiences and certain personal patterns such as difficulty handling stress, low self-esteem, or extreme pessimism about the future can increase the chances of becoming depressed. Clinical depression is a lot more common than most people think. It will affect more than 19 million Americans this year.
Depression affects people of all ages but is less common for teenagers than for adults.
Approximately 3 to 5 percent of the teen population experiences clinical depression every year. Depression can be very serious. It has been linked to poor school performance, truancy, alcohol and drug abuse, running away, and feelings of worthlessness and hopelessness. In the past 25 years, the rate of suicide among teenagers and young adults has increased dramatically. Suicide is often linked to depression.