Breast swelling and burning sensation under the ribs may be caused by trauma, breast fibroma, mastitis, cystic breast hyperplasia, breast cancer and so on. 1. Trauma: When the inner and lower parts of the breasts are hit by external violence, the soft tissues and bones in the area can be damaged, and then the symptom of burning sensation under the ribs of breast swelling is likely to occur. 2. Breast fibroma: affected by a variety of factors such as heredity and lifestyle, you may suffer from breast fibroadenoma. As the fluid grows, it can cause pressure on the surrounding tissues, which can also cause the patient to experience breast swelling and burning sensation under the ribs. 3. Mastitis: Mastitis can be induced by bacterial infections in the breast area, and after being stimulated by inflammation, it can also cause breast swelling and burning sensation under the ribs. 4. Cystic hyperplasia of the breast, which occurs in women of childbearing age, is characterized by cyclic breast pain with the formation of hyperplastic nodules. The degree of pain and the size of the nodules change with the menstrual cycle, i.e., they are aggravated during the period of menstruation, and can be relieved after menstruation. Burning sensation under the ribs of breast distension may occur. 5. Breast cancer, with no obvious characteristic manifestation in the early stage, but in the late stage, irregular, hard and poorly movable lumps can be touched in the breast, and may be accompanied by orange peel sign or dimple sign. There may be a burning sensation under the ribs with breast distension. Breast swelling and burning sensation under the ribs should also be considered for extra-mammary diseases such as herpes zoster, cardiothoracic diseases and other causes, and should be promptly consulted.