The most common clinical cause of tummy pain and breast tenderness is pregnancy. After pregnancy, due to changes in hormone levels, under the action of estrogen and progesterone, the mammary glands will be mildly swollen and painful, and will enlarge, and the nipple and areola will also appear to be colored. In addition, after pregnancy, due to the enlargement of the uterus, it may involve the ligaments of the uterus to cause tugging pain, or in the clinical situation of preeclampsia, lower abdominal pain may also occur. It is recommended to give timely examination, mainly in the clinical need to draw blood to check blood HCG, also need to do ultrasound examination. If you are not clinically pregnant, this situation may be caused by pelvic inflammation or localized hyperplasia of the breast. It is recommended to know whether there is pelvic inflammation through gynecological examination and give treatment clinically.