Obesity is caused by consuming more calories than you burn off through regular movement and exercise. Obesity doesn’t happen overnight. It occurs over time through unhealthy dietary and exercise habits.
Our bodies use the food we eat as sources of energy. If you consume high amounts of energy, particularly fats and sugars, but do not burn the energy off through physical activity, the surplus energy will be stored by the body as fat. Over time, increasing weight gain can lead to obesity.
In some cases, underlying medical conditions may contribute to weight gains, such as an underactive thyroid gland (hypothyroidism) and Cushing’s syndrome, which is a rare disorder that causes an overproduction of steroid hormones.
Medications for epilepsy and diabetes can also contribute to obesity, as can the weight gain typically associated with smoking cessation.