Breast nodule category 3 refers to benign space-occupying lesions in the breast, although they are not very serious and need regular review or surgical treatment, which may cause cancer. The size of breast nodule depends on the size of the nodule, if the nodule is less than 1cm, the appearance is more rounded, and no calcified spots are found in ultrasound, it can be observed first, and it needs to be rechecked by ultrasound every three months or half a year, and the result of the rechecking needs to be compared with the last one, if the breast nodule is more than 1cm, it needs to be excised by minimally invasive surgery or other surgeries, and it needs to be examined by pathological examination, in order to prevent cancerous changes. Breast nodule category three is a benign lesion, note that there will be cancer, must pay attention to check at any time.