Eat less fatty foods and exercise.
no it just increases it, so when you sweat your actually putting weight on.
i would recommend exercising daily and eat healthier food.
Spot reduction is a myth. If you want to lose fat the only way is just to lose fat all over your body. Fill up the spots that get too thin with muscles instead.
Running
Cardio exercise is an excellent way to lose body fat. For more information, see the page link under Related Questions.