Obesity happens over time when you eat more calories than you use. The balance between calories-in and calories-out differs for each person. Factors that might affect your weight include your genetic makeup, overeating, eating high-fat foods, and not being physically active. Obesity increases your risk of diabetes, heart disease, stroke, arthritis, and some cancers.
Common specific causes of obesity include:
- Eating a poor diet of foods high in fats and calories
- Having a sedentary (inactive) lifestyle
- Not sleeping enough, which can lead to hormonal changes that make you feel hungrier and crave certain high-calorie foods
- Genetics, which can affect how your body processes food into energy and how fat is stored
- Growing older, which can lead to less muscle mass and a slower metabolic rate, making it easier to gain weight
- Pregnancy (weight gained during pregnancy can be difficult to lose and may eventually lead to obesity)
- Polycystic Ovary Syndrome(PCOS): a condition that causes an imbalance of female reproductive hormones
- Prader-Willi syndrome: a rare condition that an individual is born with which causes excessive hunger
- Cushing syndrome: a condition caused by having an excessive amount of the hormone cortisol in your system
- Hypothyroidism(underactive thyroid): a condition in which the thyroid gland doesn’t produce enough of certain important hormones
- Osteoarthritis (and other conditions that cause pain that may lead to inactivity).