Type 1: Monthly self-examination: Every woman should do a self-examination on the fifth day of each month after her period. The method is to apply soap to the hand and search this breast, as well as the armpit and clavicle fossa, clockwise by tapping with the fingertips of the middle and index fingers. Tip: Many patients with early stage breast cancer cannot be felt at all, so you cannot rely entirely on self-examination, it is more important to go to the hospital for regular checkups! Second: Doctor’s palpation: Specialists are very experienced and more accurate in determining the presence of lumps by touch. This simple touch can screen out a significant number of patients. Third: Ultrasound: When a physician suspects a lump in the breast, an ultrasound has to be done and can be used to determine the nature and location of the lump. Tip: It is less able to identify lumps under 1 cm in diameter and may miss smaller lumps. Type 4: Mammogram: This is the most accurate method to initially determine breast cancer, which can get clear images and check out some tiny tumor sprouts that cannot be felt by hand, but the cost is higher than ultrasound examination. Tip: It is recommended that women after the age of 40, or those with high-risk factors (such as family history of breast cancer, breast cancer in situ, etc.) should have regular annual mammography examinations. The fifth type: cytological puncture examination: Many people are unfamiliar with this examination. Zhang Phosphorus introduces that during mammography, lumps or cysts in the breast may overlap with hyperplastic glands and cannot be shown; there are also some other lesions similar to breast cancer such as cysts and fibroadenomas that are difficult to distinguish with very similar performance on mammograms. Diagnostic puncture has to be performed to clarify the nature of the lesion. The method is to accurately perform a fine needle puncture (a 7-gauge needle for intramuscular injections) under direct vision, and the qualitative identification rate of benign and malignant tumors can be over 90% with this test. Tip: It is suitable for confirming the diagnosis after ultrasound examination and mammogram x-ray to find out the problem. There are concerns whether puncture may lead to tumor metastasis, and no cases have been reported.