A cystic breast nodule of about 2 centimeters is considered serious and is a common benign disease of the breast. Breast cystic nodules, generally benign diseases, belong to the category of breast hyperplasia. The main manifestation is a breast lump, sometimes accompanied by pain. Most patients appear or worsen before menstruation, and reduce or disappear after menstruation. Usually if the breast cystic nodule is larger than about 2 centimeters, surgery needs to be considered. Breast nodules can be judged benign and malignant by ultrasound and molybdenum target in terms of the size, hardness, shape, number, color, border and distribution site of the nodule, and combined with palpation for the presence or absence of pressure and pain sensation, and the presence or absence of rapid changes within a short period of time. When patients have breast cystic nodules, they should go to the hospital in time and choose the appropriate treatment plan under the guidance of the doctor, so as to avoid delaying the condition and causing adverse consequences.