A breast cancer lump may grow slowly in the early stages and then may grow rapidly thereafter. If Cooper’s ligament is invaded, it may cause dimple sign; if the subcutaneous lymphatic vessels are blocked, it may cause dermal edema and orange peel-like changes; if the nipple is cleaned, it may cause retraction and depression, etc. If breast cancer invades the pectoral muscle and fascia, it can cause fixation of the lump, which cannot be pushed, and there may be satellite foci around it, which will fuse with each other and finally form malodor and bleeding; if it metastasizes to lung, liver and bone, corresponding clinical symptoms will also appear. For patients with inflammatory breast cancer, although it is less common, the development is the most rapid and the healing is poor, while for nipple eczema-like breast cancer, the malignancy is lower, the lump grows more slowly and the chance of metastasis is slower.