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Apart from the physical discomfort caused by the excess weight, obesity is a dangerous medical condition that is associated with various orthopaedic problems, diabetes, high blood pressure, heart and other cardiovascular diseases, gallstones, and a risk factor for a number of cancers. It is also difficult to treat, and most people who lose weight regain it within a few years.
The main reason for obesity is when people eat more calories than they burn through activity. However, various other genetic, hormonal and environmental factors, as well as certain medications can also lead to obesity.