If the underwear is too tight, it will lead to local blood circulation is impeded, poor local blood circulation may lead to disease, so it is recommended that underwear must choose the right underwear to buy, and it is also recommended that it is best not to buy underwear with steel bra, so as not to press the local skin, nerves cause local discomfort of the breast. In addition, if the underwear is too tight, it may rub the nipple, so that the nipple local mucosal inflammation, resulting in local pain. So choose underwear to choose the right size for you, especially cups to fit, but also to choose cotton underwear more ventilated, sweat-absorbing, for the local skin will not cause the corresponding impact on the local growth and development of the mammary gland will not be affected.