First of all, a reasonable diet
For adolescent girls, eating some breast enhancement food is just like drinking milk to grow taller, which has a good promotion effect on breast development.
Second, exercise.
Usually you can do some push-ups, parallel bars, yoga and so on. Or take a few deep breaths every morning and evening, which can also promote chest development.
Third, proper massage.
First, use the palm of your right hand to exert force on the upper part of the left breast, that is, under the clavicle, evenly and gently push it down to the root of the breast, and then push it back up along the original route. After 20 to 50 times, massage the right breast with your left hand for 20 to 50 times. Apply a hot towel to both breasts for 3-5 minutes before going to bed every night, and massage around the breasts with your palm, from left to right, 20-50 times.