Self-examination of breast cancer includes several aspects, the so-called self-examination, which is a relatively simple and easy way for patients to do, mainly includes the following examination methods: 1. Self-touching whether there are lumps in the breast: especially those of different sizes, irregular shapes, hard texture or poor mobility should be noted. 2. The skin of the nipple should be observed for eczema-like changes such as erosion and crusting. 3. breast shape: whether there is any change, whether there is bilateral breast asymmetry. 4. breast pain: whether there is continuous, paroxysmal stabbing pain, dull pain, or hidden pain or discomfort in the breast. 5. whether there is regional lymph node enlargement: you can touch your The lymph nodes on both sides of the armpits and both sides of the clavicle are not enlarged.