Breast hypoechoicity has many reasons, which are analyzed as follows:1. Breast cysts, breastfeeding due to ductal or nipple deformity, resulting in breast cysts, but not solid tumors, there is liquid in the wall of the capsule, if it doesn’t affect the aesthetics and life, it can be observed regularly, otherwise it can be surgically removed, and the wall of the capsule should be removed cleanly, to prevent recurrence.2. Mammary hyperplasia, breast enlargement patients will have hard lumps in the breasts in the Before and during the physiological period, the hard lumps will be painful, and the pain will disappear after the physiological period is over, so you can take the free pills or lactic acid to regulate it, and in serious cases, you need to have it removed surgically.3. Breast fibroids, the tumor will suddenly increase in size during the breastfeeding period or pregnancy, which will seriously affect the aesthetics, and you need to find it early, diagnose it early, and treat it early by surgical excision of the tumor at early stage, and at the same time, you need to remove the peritoneum completely.