Noma (cancrum oris) is a severe gangrenous disease of the mouth and face. It mostly affects children between the ages of 2 and 6 years living in extreme poverty. In addition to the known factors such as malnutrition, lack of vaccination in children and poor oral hygiene, several social and environmental factors such as maternal malnutrition and close spacing of pregnancies that result in offspring with increasingly weakened immune systems are potentially related to the onset of the disease. The aim of this guide is to assist the ministries of health (MoHs) to identify a general goal to be attained by the end of five years, with a view to sustainably reducing the incidence of noma as a public health problem through programmes that are fully integrated with national health planning, strengthening of primary health care (PHC) and attainment of UHC.