You can get up in the morning, kneel on the bed with your knees shoulder width apart, put your toes on the bed, hold your chest out, and slowly lean back until your hands grasp your feet and bend your body into an arch as much as possible for 20 seconds. Be careful not to open your mouth, otherwise the effect will not be obvious.
Or you can try a simpler massage. After washing her face every night, Bobiya massages in circles under her chin. If she keeps doing this every day, her chin will get longer in a few months.
Of course, you can also put one hand on your forehead, lean back your neck, dip the other hand in bath or soap, and rub your neck and chin in circles from bottom to top when you are completely relaxed. Doing this massage often can eliminate the relaxation and wrinkles of chin muscles, and the effect is excellent.
I hope what I said can help you.