Breasts press down a little pain may be physiological factors, but also may be the manifestation of certain diseases symptoms, such as trauma, mammary duct dilatation, breast hyperplasia, mastitis, etc., should be timely consultation to find out the cause of the disease. 1. Physiological factors: If you have an irregular lifestyle, such as staying up late, smoking and drinking, it can cause a little pain in your breasts. 2. Pathologic factors: (1) trauma: after the chest is hit, impact, stabbing and other traumatic injuries, you may not pay attention to it at that time, but after a period of time, you will find that the skin, nerves and other tissues in the breast area are damaged, and the phenomenon of a little bit of pain when pressing on the breast will occur. (2) Dilatation of milk ducts: Women who are breastfeeding may have dilatation of milk ducts due to accumulation of milk, inflammation, infection, etc., which may cause discomfort such as breast pain, nipple overflow, and lump in areola area. (3) Mammary gland hyperplasia: In the case of long-term stress and lack of sleep, the patient’s endocrine imbalance may occur after estrogen increase, there are breast lumps, nodules and other hyperplasia problems, which are manifested in the form of a little pain in the breast, swelling, nipple overflow and other conditions. (4) Mastitis: It occurs in breastfeeding women, such as the accumulation of milk, bacterial infection, cracked nipples, etc., may induce mastitis, which will lead to the patient’s breast pressure a little pain, high fever and other discomforts. Breast tenderness should also exclude breast fibroids, breast cancer and other tumor factors, the above symptoms should be timely consultation, please ask the doctor to clarify the specific causes, if necessary, to carry out the appropriate treatment.