Never wear tight or corset underwear in high school. Excessive pressure will oppress the breast and make the blood not circulate, which can cause breast swelling, pain, discomfort and even breast dysplasia. Girls' underwear should be mainly breathable cotton, with natural cotton lining. You know, high school students in their developmental stages often have a lot of exercise. When choosing underwear, high school girls must choose the model that suits them. Don't be too loose and too tight, resulting in a bad chest shape. It's best to try the tightness of underwear and choose the right model. Because young girls' breasts are gradually growing up, with the growth of age, breasts are also constantly developing, and the size of bras should be constantly increased, so it is appropriate to feel neither too loose nor too tight. In addition, if you want to continue to let the breasts grow and shape, you can choose underwear that naturally wraps the breasts, such as full cups, 3/4 or 1/2 cups. You need steel rings to support the breasts and concentrate them in the middle to avoid the problem of early expansion or sagging when you grow up.