During puberty, most of the hard lumps inside the breast are normal, and a small number of them can be seen as tumors in the breast. During puberty, girls are affected by the hormone level in the body, there are hard lumps in the breast when touched, occasionally painful, most of the consideration of breast development hyperplasia, which is also a sign of the beginning of puberty, belongs to the normal situation. In addition, if you touch a round hard lump in the breast, can move back and forth, but also consider the breast fibroadenoma, mostly seen in young women, which is not normal, need to go to the hospital to check and confirm the diagnosis. Boys during pubertal development, there will also be a hard lump inside the breast, touch with pain, most last 1~3 months, if six months later there is still a hard lump, pain need to go to the hospital. Youth development period chest inside the hard lump, most of the normal, if necessary, go to the hospital for examination.