Hello, 1. Wear a bra correctly: the bra should not be too loose or too tight. Too big a bra can't support the breast, too small will hinder the development of the breast. The appropriate bra size is to measure your lower bust, that is, measure along the lower edges of both breasts with a soft tape measure. Bras should be changed every day in summer and at least twice a week in winter to keep breasts clean. 2. Proper exercise: hunchback or poor posture is the most likely to affect the normal development of the breast. Stick your back straight on the wall, put your hands on your knees, raise your hands to a vertical position, keep your head and hands as straight as possible, but keep your waist upright.