Environmental and societal factors can play a role in morbid obesity. For example, high fat, high sugar foods are readily available and are often cheaper than healthier alternatives. Fast-food drive-thrus and hectic day to day demands can lead to a daily habit that often expands your waistline. Regardless of the reason, stress is a way of life for many people and the effects can mean weight gain. Studies have shown that chronic stress can be tied to an increase in appetite due to changes in adrenalin and cortisol levels.
The lack of sleep due to a variety of issues may be a factor in contributing to obesity. Sleep is essential in maintaining certain hormone levels. Ghrelin is the hormone that tells you when to eat, and when you are sleep-deprived, you have more ghrelin. Leptin is the hormone that tells you to stop eating, and when you are sleep deprived, you have less leptin. You may be eating more, plus your metabolism is slower when you are sleep-deprived. Sleep disorders, such as Sleep Apnea, are a cause/ contributor as well.