The bruising in front of the chest is particularly obvious, caused by the obvious exposure of local subcutaneous blood vessels in the breast, and should not be a manifestation of disease. The main reasons include the following aspects: 1. It may be due to the fact that the patient has less subcutaneous tissue and thinner skin. The bruises mentioned by the patient should be veins located in the fatty layer under the skin. If the subcutaneous tissue is less, the patient’s veins will be obvious and be observed to present this state. 2. It may be caused by the action of tension on the blood vessels, which is mainly directly related to the sudden enlargement of the patient’s mammary glands and the increase in tension. For example, the patient’s breast has a sudden enlargement of the swelling, there is an inflammation of the breast, etc., will cause the state of vascular varicose, which will also become clinically more obvious and visually visible. Such a condition should be clinically combined with other local clinical manifestations of the breast, and if it is accompanied by significant pain, the cause needs to be clarified by an early hospital visit.