What causes chest distension and pain?

Possible causes of chest pain and distension may include the following: 1. Physiological factors: During specific periods such as premenstrual phase, pregnancy, and puberty, hormonal changes in the body, such as increased estrogen levels, may lead to mammary gland hyperplasia, thus causing chest pain and distension. 2. Breast diseases: Breast pain and distension can also result from breast disorders such as mastitis, mammary gland hyperplasia, breast fibroadenoma, and breast tumors. Mastitis is commonly caused by milk stasis or bacterial infection, while mammary gland hyperplasia is associated with endocrine disorders, unhealthy lifestyle habits, and other factors. 3. Pulmonary and cardiac diseases: Chest pain and distension can also be caused by pulmonary and cardiac conditions such as pneumonia, acute pulmonary embolism, myocardial infarction, and angina pectoris. These conditions are usually accompanied by other related symptoms such as coughing, dyspnea (difficulty breathing), and palpitations. The above causes are for reference only. A timely medical consultation is necessary to obtain an accurate diagnosis and appropriate treatment based on individual symptoms and signs.