Accumulated breast cysts are tough, with a softness proportional to the degree of fluid collection inside, and are relatively soft in texture compared to solid nodules. Some breastfeeding women who do not take good care of their breast ducts may develop an accretionary cyst, which causes milk to accumulate in the breast and cannot flow out. The disease is benign and does not cause serious effects on the body, and it may manifest itself as mild swelling and pain, accompanied by secondary infections or localized reddening of the skin, a feeling of tenderness, and abnormal enlargement and tenderness of the lymph nodes of the axilla on the same side. Breast cysts may be characterized by round lumps with smooth surface that can be moved, and large lumps with cystic sensation when touched. If the solids inside the cysts become thick, the elasticity will disappear and the hardness will increase and become harder. In case of breast cysts, it is recommended to consult a doctor and receive treatment in accordance with the doctor’s instructions in order to avoid delaying the condition.