Breast is one of the signs of female beauty, full breasts not only can set off a graceful body, but also is the performance of physical fitness. The so-called breast dysplasia refers to the fact that after the age of 16 or 17, the breasts have not developed and other sexual characteristics have not appeared. The first thing you need to do is to find out the cause of breast dysplasia and prescribe the right medicine to correct it better and faster. 1, the symptoms of breast dysplasia are generally 16, 17 years old when the breast development is mature. At this time, the breast shape is full, the size of both breasts is basically close, but not exactly equal. The size of the breast varies from person to person: generally long and thin people have smaller breasts, short and fat people have fuller breasts. Using a tape measure to determine the diameter of the breast (from the upper edge of the breast through the nipple to the lower edge of the breast) is 16-18 cm are normal. However, due to genetics, diseases, childbirth, nutritional status and life, psychological and other reasons, often make some girls to 18 or 19 years old. The chest is still flat, lacking the beauty of the curves that women should have. 2, what are the reasons for small breasts? (1) Related to the lack of hormones. Breast development is affected by the anterior pituitary gland, adrenal cortex and ovarian endocrine hormones. The anterior pituitary gland produces pro-breast hormones which directly affect breast development, and the ovaries produce estrogen and progesterone to promote breast development. In addition, growth hormone and insulin are also indispensable components of breast development. Therefore, small breasts have a lot to do with insufficient hormone secretion. (2) Breast size is also affected by factors such as race, genetics and body type. For example, western women’s breasts are much fuller than oriental women; generally speaking, the mother’s breasts are small, then the daughter’s breasts are not plump; fat people because of fat accumulation, the breasts appear full and prominent, thin people fat accumulation less, the breasts appear small and flat. (3) Suffering from a certain disease can also affect breast development. If a young girl has hypopituitarism, pituitary dwarfism and primary ovarian insufficiency, her breasts will also be small. 3, how to promote breast development for women with too small breasts, in the correction, must first find out the cause. If it is caused by a disease, the disease should be treated first. For simple dysplasia, can be corrected through drugs, diet, massage, exercise, mammaplasty surgery, etc. (1) receive massage breast massage can not only promote the activities of the chest muscle groups, increase its tension, but also can stimulate the development of the mammary glands, to play the purpose of augmentation breast. The specific rest method is: use their own hands cross massage breast, from the lower end of the breast gradually up to the armpit. Because the human meridian of the liver meridian, spleen meridian and stomach meridian, etc. are from here to the breast. Massage is usually bursting into action at night or in the morning, 10-15 minutes each time. (2) drugs breast development depends mainly on the level of hormones in the body. Prisoners of this, for some simple breast dysplasia, a small amount of estrogen, such as ethinyl estradiol 0025 mg once a day, can be tried under the guidance of a doctor. Taking estrogen followed by progestin for 5 days in a row is more effective. Although hormones can increase the size of the breasts, this is temporary and once the drug is stopped, the breasts will shrink, while long-term use of hormones is prone to many side effects and unpleasant consequences. Many of the breast enhancement preparations sold on the market today are mostly made of some Chinese herbs, multivitamins, amino acids and some hormones, which can make the flat, shrunken breasts plump in a short time after local external rubbing or taking, but the effect is fair, and side effects can occur with prolonged application, so they should be used with caution. (3) Some girls, although flat breasts, thin body, but there is no disease. This kind of girls, with the growth of age, marriage, childbirth, breast will also be plump up un, the so-called self-cure. In addition, because the breast is attached to the pectoralis major muscle with its fascia and intercostal muscle front, therefore, more chest muscle exercise, such as chest expansion exercises, limb stretching exercises, push-ups, etc., on the development of dry chest and breast.