Because there is more fat in the chest. Of course, the best way is to lose weight. Through effective exercise and reasonable diet, gradually reduce your weight, then the corresponding body fat will be less, and the chest will naturally become smaller.

Then, you also need to pay attention to your diet. Don't eat too many nourishing things with big breasts. Eat more fruits and vegetables, don't eat big fish and big meat, consciously cultivate your healthy eating habits, and fundamentally reduce the accumulation of chest fat.

Finally, massage your chest more. Massage your chest with Southman after exercise can make your chest firm and keep your skin moist. This two-pronged approach can make the chest thinner and the lines look good.

I hope my answer can help you!