In this modern civilization, the society is running through a so called fast life style. Under the mask of fast life style we are continuously struggling to hide our faults in daily lives. As a result of which the entire society have become submerged under the dirty dump of diseases, a non sense habits. Among these dirts, obesity is one of the major threat to modern society, which is also a principal contributing factors of most of the diseases of this era. But unfortunately in most of the cases it is a self made condition. Obesity is not only a threatening condition but also a common manifestation of many other systemic diseases. Obesity also increases the risk of other diseases. Therefore 'World Health Organization' WHO defined that "obesity is a global problem". This paper deals with obesity, it causes pathogenesis, prevention and management and differential diagnosis method. This paper will admonish the society how we allow obesity in our life carelessly, how to get relief from it and the fate by this fatal condition. Arpan Laskar | Dr. Sinchan Das "Obesity, A Global Threat" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd25274.pdf