Right breast cystic nodule refers to a cystic lesion in the right breast whose cystic contents are mostly fluid. Cystic nodules in the right breast usually have fluid in the capsule, especially when the nodule is caused by milk stagnation during breastfeeding, which can be clinically referred to as cumulus lactis cysts. These cystic benign nodules usually grow very slowly, and a few of them do not grow, so they often do not have obvious symptoms and do not need to worry too much. For slow-growing or non-growing right breast cystic nodules, regular breast ultrasound or molybdenum target checkups are sufficient to observe the changes in the size of the cysts through dynamic examination, whereas for those who have significantly increased in size within a short period of time or who have sudden malignant changes, surgical treatment should be considered. It is recommended that patients with cystic nodules in the right breast should consult a regular hospital and receive standardized treatment under the guidance of a doctor.