Sexually transmitted diseases (STDs) remain a major problem in Thailand, and indicate a lack of correct knowledge and understanding in protecting oneself from contracting the disease, as well as a lack of awareness of the dangers of the disease. The situation of STDs tends to increase continuously. According to the report of the Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health, it was found that the morbidity rate increased from 19 cases per 100,000 population per year in 2013 to 23.2 cases and 28.9 cases per 100,000 population in 2016, 2015 and 2017, respectively, with youth aged 15-24 years having the highest proportion of morbidity.