Breast ultrasound is now a commonly used test in mammography. Breast ultrasound can also be used to detect inflammatory changes, such as pus accumulation or the formation of large abscesses, and it is a very suitable method for breastfeeding and does not affect the accuracy of the examination. Breastfeeding is a special physiological period, may be different from the normal breast sonogram, the same is also the observation of the glands of the breast, breastfeeding ultrasound is non-invasive, non-radiation examination, but also very economical and convenient. Although lactation is different from normal physiological conditions, it can also detect some breast occupying lesions, such as benign nodules and malignant nodules, etc. It can also observe the internal echoes of the nodules, the morphology of the nodules, the border echoes of the nodules, the internal blood supply of the nodules, and whether the axillary lymph nodes are enlarged.