You can practice your chest. Men practice chest, hoping that the chest muscles will develop in all directions and have a clear outline. When they are well trained, they tend to be square, long stroke, peak contraction and slow return. Women can use short strokes and quick movements to stimulate chest muscle thickening. The middle seam, upper, middle and lower pectoral muscles and the outer edge should be stimulated with different movements. In addition, the accessory breast is determined by congenital genes and can be improved by stimulating and exercising the outer edge of the pectoral muscle. Note that if there is a lump on your hand, it will always swell and hurt or affect your normal life during the physiological period. You should see a doctor immediately, and the general doctor will also recommend radical surgery.