Itchy breasts may be caused by cancer. If a breastfeeding woman shows dark red spots on her breasts with papules and pimples on top, due to scratching and so on, there may be obvious exudation in the form of punctate vesicular surface on the lesion area, at this time, it should be considered as breast eczema, but fungal microscopy should be performed to exclude fungal infection; if breast eczema is excluded and the patient is older, the possibility of breast eczema-like cancer should be considered, and further improvement of If breast eczema is excluded and the patient is older, the possibility of eczema-like breast cancer should be considered and further examination such as skin pathology biopsy should be performed.