Feeling a large disc of hardness in the breast may be due to physiological or pathological causes. Generally, physiological factors do not require special treatment, such as normal nucleus development during breast development, and do not cause excessive health effects. Pathological factors causing a large disc of hardness in the breast usually require treatment of the primary condition, and symptoms can usually be relieved. I. Physiological factors: 1. The influence of special periods: common in women, such as women’s menstruation, pregnancy and other periods of elevated estrogen lead to the appearance of hard discs. When breastfeeding, women’s breast memory accumulation of milk, can also lead to women feel a large disc of hard material in the breast. For some men, during the growth period breast nucleus development, may also appear very large disc hard; 2, bad habits: If there are recent late night, emotional abnormalities, improper diet and other bad habits, resulting in endocrine fluctuations, thus stimulating abnormal growth in the breast, manifested as feeling a large disc hard in the breast, can be relieved after the restoration of regular rest and relaxation. Pathological factors: 1, breast hyperplasia: is a common disease in the breast area, mostly manifested as abnormal growth in the patient’s breast, resulting in the feeling of a large disc of hard material in the breast, some patients accompanied by pain, generally do not need too much treatment, need to follow the doctor’s instructions for regular follow-up, lumps larger by the doctor’s assessment, choose surgery to remove; 2, breast fibroadenoma: is mostly due to the patient’s long The patient should undergo surgery as soon as possible under the doctor’s assessment to remove the breast fibroadenoma to avoid its expansion and malignant transformation; 3. The patient needs to undergo systematic anti-cancer treatment, such as surgery (such as breast preservation surgery, total mastectomy, etc.), as well as chemotherapy, radiotherapy, targeted therapy, etc. to eliminate the cancerous lesions; 4. Superficial phlebitis of the breast: it is mostly caused by the long time pressure on the breast, and small blood clots are formed in the breast, which leads to the symptom of feeling a big disc of hard objects in the breast, but it is relatively rare. Patients are suggested to choose suitable underwear and apply heat compresses and other physiotherapy treatments on the breast to relieve the symptoms.