Breast nucleus is usually found in women aged 20-25 years old. Breast nucleus is the name of the Chinese medicine disease, is a painful lump in the breast, mostly closely related to the menstrual cycle and emotional changes, is a kind of benign tumors of fibrous tissue and glandular epithelium in the breast lobule, usually occurring in 20-25 years old women. It is mainly caused by disorders of the Chong Ren (meaning malfunctioning of the Chong and Ren veins, resulting in the body’s qi and blood not being able to pass through); it can also be caused by liver qi being uncomfortable and stagnant or by liver qi stagnation (poor qi and blood transportation of the liver and depression of emotions and moods). It may appear as a single hard nodule in the breast area with clear borders and good mobility. If breast nuclei are present, it is important to go to the hospital in time and be treated by a doctor for evidence-based treatment. Daily attention should be paid to emotions, avoid depression, excessive psychological pressure, etc., avoid staying up late and develop good living habits.