To reduce a double chin, you need to focus on both diet and exercise. Eating a healthy diet that is low in calories and fat can help you to lose weight and tone your muscles, while regular exercise can strengthen the muscles in your face, neck, and chin area. To best target these areas, focus on exercises that will help to tone the muscles in your neck, such as chin lifts and neck rolls. Additionally, you can try facial exercises that can help to tone the muscles in your face, such as puckering your lips and making facial expressions. Eating healthy and exercising regularly can help you to reduce a double chin and achieve a slimmer, more toned look.