Definition of Health according to WHO

World Health Organization (WHO), defined Health as being “a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity” in 1948. Since then only few of the publications believed on the definition of health and its evolution in the first 6 decades. Others declare the definition, which has not been modified since 1948, “simply a bad one.”

In 1986 WHO also said that health is “a resource for everyday life, not the objective of living. Health is a positive concept emphasizing social and personal resources, as well as physical capacities.” Also there is a term known as Mental Health and it describes either a level of cognitive or emotional well-being or an absence of a mental disorder.
According to the World Health Organization, mental health is “a state of well-being in which the individual realizes his or her own abilities, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to his or her community”. However, despite official definitions, the term mental health, and the question of whether or not an individual is ‘mentally well’, remains a subjective assessment.
Personal health depends partially on one’s active, passive, and assisted observations about their health in their everyday life. The information gleaned from such observations may be used to inform personal decisions and actions, as well as clinical decisions and treatment plans (e.g., a patient who notices his or her shoes are tighter than usual may be having exacerbation of left-sided heart failure, and may require diuretic medication to reduce fluid overload) for patients who share their observations with their health care providers.
Hygiene is the practice of keeping the body clean to prevent infection and illness, and the avoidance of contact with infectious agents. Hygiene practices include bathing, brushing and flossing teeth, washing hands especially before eating, washing food before it is eaten, cleaning food preparation utensils and surfaces before and after preparing meals, and many others. This may help prevent infection and illness. By cleaning the body, dead skin cells are washed away with the germs, reducing their chance of entering the body.
more on : http://en.wikipedia.org/wiki/Health