The patient has a hypoechoic nodule behind the nipple with clear boundary, no blood flow lesion, and attenuated echogenicity at the back, which may be due to breast hyperplasia or breast space-occupying lesion, and it is recommended that the patient seeks medical treatment in time for further examination. It may be caused by improper diet, family heredity, or endocrine disorders, etc. It is recommended that the patient seek medical attention in time for a mammogram, and if necessary, a biopsy can be performed to rule out malignant changes. If the nodule is benign, it is recommended to review regularly and observe the changes. If the nodule is malignant, it should be actively treated by surgery. If the patient has any breast discomfort symptoms, he should go to the hospital in time, relax, avoid anxiety and have a reasonable work and rest.