Deaton (2002) found that proportional increases in income show the correlation with decreases in mortality. Teo (2013) and colleagues establish a mathematic mode to conclude that the higher income cities are related to healthier diet, more physical activity and less smoking which have less chance to cardiovascular disease. Therefore, from different income families, people have different lifestyles which lead to health inequality. Furthermore, due to massive population with limited public resources, the public services such as health care would lose equity between the wealth and the poor. For example, in Hong Kong, rich people are more health than the poor (Chung, 2015), because they can afford the high expends in private health care and extremely high house price. As for living conditions in Hong Kong, low-income people live in the narrow, damp and dirty places so that people have negative effects on their health, meanwhile the resources of health care are not available for them which worsen the poor conditions.
To sum up, health inequality is caused by the different education, various careers and imbalanced income that are concluded as social causes. However, the precise reasons for education causing health inequality are unknown; meanwhile, the careers are difficultly showed direct associations with specific diseases, and the analysis of the cause of income is narrow in one place. Although education, career and income are