SUNDAY, Feb. 5 (HealthDay News) -- More than 60 percent of American teens have at least one profile on a social networking site, and many spend more than two hours a day on social networking sites, according to the American Academy of Child and Adolescent Psychiatry.
Teens and young adults who text frequently -- such as more than 300 text messages a day -- may be risking more than sore thumbs, according to a new study.
