Please touch your face to see if it is your face. If the bone is born that big, there is no other way but to go to a plastic surgery hospital for bone cutting. If it is a meat problem, you can massage your chin with your hands and do it every day. In addition, you can buy some compact massage cream to massage your face, and the effect will be better. You can also shout "a o e y u v" to the mirror ten minutes before going to bed or when you get up in the morning. If all else fails, I suggest you change your hairstyle, try not to cut your bangs flat and make your face more round. Personally, I prefer oblique bangs.
If you lose weight, you are tall and can't see how fat you are. I suggest not to lose weight, but if you insist on losing weight, I suggest you exercise every day from 17 to 19 during the prime time of losing weight, drink at least eight glasses of water every day, control your appetite, and eat nothing except three meals ~