Adolescence is a challenging life period in which young people have to deal with both physical and mental changes. For gay, bisexual and questioning (BGQ) youth, the challenges in their adolescents could be tougher. Previous research has demonstrated the unique psychosocial and sexual health needs of this vulnerable sub-group of the youth population. However, most of these studies were conducted in the West. Local data has been far from enough for us to understand the lives and health needs of Hong Kong GBQ youth, who have been affected by a different set of cultural values and social situations. This study adopted a qualitative approach to explore the lives of and the factors affecting the health of GBQ youth in Hong Kong. Both focus groups and individual interviews were used. Data analysis was guided by the principle of grounded theory. Twenty sexual minority male youth aged between 15 and 21 were recruited in the study. It appeared that the discovery of sexual identities for Hong Kong GBQ youth usually began in the early adolescence and was usually followed by a stage of struggle and denial of same-sex attraction. Traditional Chinese family values and mainstream Christianity doctrine heavily influenced on the informants’ and others’ acceptance towards homosexuality. GBQ youth also encountered different forms of prejudicial events in practically all social situations which in turn affected their psychosocial wellbeing and sexual health. Furthermore, parents, school professionals and healthcare workers seemed to lack appropriate skills and attitudes to promote GBQ youth’s health. / published_or_final_version / Public Health / Master / Master of Public Health