Generally, women after the age of 35 are recommended to have a breast ultrasound every six months or so, each time about 3 days after menstruation. Ultrasound of the breast is a non-invasive, convenient and simple examination that can quickly detect nodular lesions in the breast and make a preliminary judgment on the nature of the lesion. If there is clinical suspicion of the lesion, a fine needle aspiration can be performed under ultrasound guidance to accurately determine the benignity and malignancy of the lesion. Due to the high pressure of work and life of modern women and irregular life and rest, the incidence of breast cancer is now showing a younger trend. And ultrasound plays an important use in the detection of breast cancer, and early breast cancer is better treated. It is recommended that women should pay attention to regulate their lifestyles and have medical checkups on time. For women who have family history of breast cancer, they need to pay more attention to breast ultrasound examination.