Healthism refers to the ideology that prioritizes physical health and wellness above all else, and that individuals are solely responsible for their own health outcomes. The term was first used by Ivan Illich in his 1976 book "Limits to Medicine: Medical Nemesis: The Expropriation of Health." The medicalization of everyday life refers to the phenomenon where non-medical aspects of life, such as emotions, behaviors, and social problems, are increasingly defined and treated as medical conditions. This process leads to the expansion of medical influence into areas that were previously seen as outside the scope of medicine, and it can result in a shift in the way that people understand and experience their own health and well-being.
Healthism and the medicalization of everyday life are related in that both are driven by a focus on health and wellness. However, healthism tends to emphasize individual responsibility for health outcomes, while the medicalization of everyday life tends to emphasize the role of medical professionals and medical technologies in shaping our understanding and experience of health. Critics of healthism and the medicalization of everyday life argue that these ideologies can lead to a narrow and overly-medicalized view of health, neglecting the social, cultural, and environmental factors that play a significant role in health outcomes. They also argue that the medicalization of everyday life can result in the overdiagnosis and overtreatment of conditions that may not actually be medical problems, leading to harm to patients and a waste of resources.