Obesity or overweight s defined as an abnormal or excessive fat accumulation that presents a risk of developing different heart related ailments . Obesity can be caused due to different reasons and it may impact our overall health . A person can become obese due to major reasons and this may include thyroid problems , certain types of medications or due to the lifestyle a person is leading . The most common causes of obesity can be due to physical inactivity , overeating ,genetics , a diet high in simple carbohydrates and some psychological factors . Obesity can make the body resistant to insulin and the person may develop diabetes .