There are many concept of health.Health is an most important part of all human being. Discuss below the changing concept of health:
        

                  1.Biomedical concept
                  2.Ecological concept
                  3.Psycho-social concept
                  4.Holistic concept


Biomedical concept:
                                    This concept visualized health as a state of "freedom from disease". This was mainly the result of the prevailing 'germ theory of diseases',which dominated the through process of the medical profession in the early twentieth century ,when the scientific work of Pasteur ,Kock,Lister and other contributed to the formulation of the theory.Biomedical concept held the view that disease is caused due to damage of the human body by a causative agent and health can be restored by repair of the damage.

                                
 Ecological concept :
                                      This concept was elaborated following further scientific resources and was based on the view that health depends on a flexible equilibrium between human beings and the environment in which they live.


Psycho-social concept:
                                      While the ecological concept was being propounded, intensive social science research indicated that whereas health may be partly dependent on the biomedical and environmental processes,psycho-social factors including cultural, economic political and other related factors also have profound effect on human well being .


Holistic concept :
                               The holistic concept of health thus emerged by combining the three concepts describe above . This concept agrees  that health is the product of the multifaceted process incorporating all the three concepts.