Breast extrusion of coffee-colored stuff, do MRI can be seen to some extent. Breast MRI is an important supplement to mammography and ultrasonography. Breast MRI examines the tissues with higher resolution; through 3D imaging, multi-angle, multi-layer and multi-parameter display, it is more accurate in localizing the size, number of forms and location of lesions. Therefore, it is advantageous for the discovery of tiny lesions, multi-center and multi-foci and evaluation of lesion extent. Meanwhile, breast MRI has greater value for the situation of erosion and infiltration of the breast, the selection of preoperative surgical methods and postoperative evaluation. However, due to the high price of MRI, it is mainly used as a complementary diagnosis to mammography and ultrasound, and MRI cannot replace mammography and ultrasound. If the breast is squeezing out coffee-colored stuff, it is considered that the possibility of breast overflow is high, and it can be examined by endoscopy of breast ducts and cytological examination of nipple overflow smears. The appropriate examination means for different breast diseases are different. If there is a manifestation of nipple discharge, in order to avoid the progression of the disease and delay in treatment, it is recommended to consult a doctor in time, and under the advice of a specialized doctor, choose the appropriate examination means to determine the cause of the disease, and take therapeutic measures at an early date.