As well adolescents with epilepsy as with asthma described limitations of their daily life and concerns about the future. What is Known: • Epilepsy and bronchial asthma are frequent chronic diseases in adolescents. • Those diseases can affect psychosocial development. What is New: • Adolescents with epilepsy and bronchial asthma described a high burden of their disease, and most adolescents had not used the Internet to inform themselves on their disease. • Especially adolescents with epilepsy fear limitations in their job possibilities, inheritance of their disease and complications in their prospective pregnancy.