Breast cancer is one of the main diseases affecting women’s lives nowadays, and with the development of society, women are becoming more and more aware of the disease, but do not know how to diagnose and treat it. Most of the patients in the outpatient clinic come to the clinic because of breast pain, and sometimes the patients say that they can feel a lump, and everything is normal after coming to the hospital for examination. This is related to the patient’s examination techniques. I think patients need to learn to examine themselves. At first, patients will not be able to check themselves, but they must communicate their self-examination methods to the doctor, who will correct your methods and teach you how to check. Patients should learn to compare the results of your breast examination, and of course the breasts feel different at different times of the menstrual period, which should be communicated to the doctor. This way the patient interacts with the doctor during the visit. Self-examination is done in a sitting or supine position, using the fingers of both hands to alternate downward pressure for examination rather than pinching with the hands. The more common screening methods used in hospitals are ultrasound and mammograms, which can be done once every 3-6 months, and molybdenum x-rays, which can be done once a year after the age of 35, depending on the circumstances. This allows early detection of suspicious lesions in the breast. If the lesion is suspected, ultrasound-guided biopsy can be performed.