You are in the obese range.
There are many health risks associated with being obese, including high blood pressure, diabetes, heart disease, and some cancers.
It is important that you do not gain any more weight. See the eating a balanced diet section for information on healthy eating. You need to make lifelong changes to your lifestyle and diet in order to lose weight and improve your health. Make an appointment to see your doctor to be referred to a dietician for specialist dietary advice.
Even losing just 10% of your current weight will help to lower your risk of health problems.
Aim for slow and steady weight loss - about 0.5 - 1 kilogram (1-2 pounds) a week. "Crash dieting" is not healthy, and usually results in the weight being regained quickly.

