There is a lot of milk left in the breast, which is not sucked out in time. When feeding for the second time, I didn't feed the breasts that I didn't suck clean last time. This is repeated several times, so that the inner hair of the breast on the non-breast-sucking side accumulates more and more, resulting in breast milk accumulation on the breast on the non-breast-sucking side. In addition, nipple dysplasia, nipple too small, nipple invagination, hinder the baby to suck milk, resulting in milk can not be completely emptied and cause milk deposition. Symptoms of galactorrhea The initial symptoms of galactorrhea are breast swelling and pain, a lump can be touched in the breast, and there is tenderness. The skin color on the skin surface can be normal or reddish. Maternal women often have a fever when accumulating milk. If the milk cannot be discharged in time during this period, it can develop into acute mastitis and finally develop into breast abscess. Mammography, the full name of mammography, is one of the main methods to diagnose breast diseases. Mammography is a noninvasive method for detecting breast diseases, which is painless, simple, easy to operate, high in resolution and good in repeatability. Images can be compared before and after, regardless of age and size. Mammography is called the international gold standard of mammography. The latest upgraded mammography is characterized by more accurate and precise detection of breast masses that doctors can't reach, especially for large breasts and breast augmentation, with a diagnostic rate as high as 98%. For T0 stage breast cancer (negative clinical diagnosis), only soft X-ray examination can be used for early detection and diagnosis, with diagnostic sensitivity of 82% ~ 89% and specificity of 87% ~ 94%. Not only can the dense breasts or large breasts of young women be well displayed, but also the atrophic breasts of middle-aged and elderly women can be seen more carefully, and cancerous tumors as small as 0.3cm in diameter can be found, and calcification that is difficult to find in general examinations can also be clearly presented. Moreover, molybdenum target can also show clear images of breast after breast augmentation and breast after prosthesis implantation, and galactorrhea must be treated in time to prevent galactorrhea from causing other breast diseases.