Breast pressure pain mainly has the following causes: First, female breast enlargement leads to breast pain, the body before the onset of menstruation estrogen levels rise, stimulating the expansion of the breast ducts lead to breast pain, after menstruation to return to normal for physiological pain. Second, the formation of breast nodules or breast cysts after breast enlargement, with the increase of nodules compressing the surrounding nerves cause breast pain. Third, malignant tumors of the breast lead to breast pain. Fourth, breast milk stagnation or the formation of acute mastitis during breastfeeding. Fifth, elevated hormone secretion in early pregnancy leads to breast pain. Sixth, trauma to the breast or other locations of the chest, such as violent extrusion of the breast, collision. Seventh, pleurisy, inflammatory stimulation leading to chest pain. Eighth, intercostal neuritis in the chest, which causes pain with breathing movement. Ninth, inflammation or stress reactions in organs such as the heart or lungs cause pain, such as angina, pneumonia, etc. Tenth, cholecystitis, gallbladder stones, gastritis, esophagitis and other digestive tract diseases.