Health education can be defined as the principle by which individuals and groups of people learn to behave in a manner conducive to the promotion, maintenance, or restoration of health. Health education is a profession of educating people about health. Areas within this profession encompass environmental health, physical health, social health, emotional health, intellectual health, and spiritual health, as well as sexual and reproductive health education. Health education has evolved into health promotion. Health education is any combination of learning experiences designed to facilitate voluntary actions conducive to health. Health promotion is the combination of educational and environmental supports for actions and conditions of living conducive to health, thereby including health education. four other main developments are relevant: the need for planning, the importance of evaluation, the use of social and behavioral science theories in the development of health promotion interventions.