Although obesity is usually the result of overeating and lack of exercise, in a small percentage of cases excess weight gain is a symptom of a [[disease]] such as hypothyroidism and Cushing's syndrome.<ref>[http://www.webmd.com/diet/medical-reasons-obesity Medical causes of obesity]</ref>
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Although obesity is usually the result of overeating and lack of exercise, in a small percentage of cases excess weight gain is a symptom of a [[disease]] such as hypothyroidism or Cushing's syndrome.<ref>[http://www.webmd.com/diet/medical-reasons-obesity Medical causes of obesity], WebMD</ref>