ABSTRACT What is oral hygiene? Oral hygiene is a basic necessity of a person to take good care of the oral cavity by practicing healthy habits such as brushing, flossing and etc. Lack of these practices might lead to complications, studies say, avoiding flossing results in 40 percentage of oral cavity being unclean and even worse conditions. Neglecting oral hygiene not only cause oral complications but might also affect the overall health directly and indirectly, for example, Studies recommend that oral bacteria and the redness connected with a rigorous type of gum disease might play a role in some diseases and certain diseases, such as diabetes and HIV/AIDS, can worse the body's fight to infection, making oral health problems more rigorous. This article will summarize the importance of the need to take good care of the oral cavity and will also highlight the overall health issues the oral problems might cause.