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 usually 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 causes of small breasts? (1) Related to the lack of hormones. The development of breasts is influenced by the anterior pituitary gland, adrenal cortex and ovarian endocrine hormones. The anterior pituitary gland produces pro-breast hormones which directly affect breast development, while 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, heredity 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 full; 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 small breasts, when correcting, the cause must first be identified. If it is caused by a disease, the disease should be treated first. For simple dysplasia, can be corrected through drugs, diet, massage, exercise, breast augmentation 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 meridians of the liver, spleen and stomach meridians 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 currently on the market are mostly made from some Chinese herbs, multivitamins, amino acids and some hormones, which can make flat, shrunken breasts plump in a short time after local external rubbing or taking them, but the effect is fair, and side effects can occur with prolonged application, so they should be used with caution. (3) Some girls, although their breasts are flat and their bodies are thin, but there is no disease. This kind of girls, with the growth of age, marriage, childbirth, breasts will also be plump up un, the so-called untreated 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.