The fact that there are veins around the breasts may be a normal phenomenon, or it may be caused by mastitis or breast hyperplasia. 1. Normal phenomenon: the blue veins around the breast, mainly refers to the breast subcutaneous veins in a more obvious state, the above situation, not necessarily suffering from organic diseases, and personal constitution has a link, part of the population of the subcutaneous fat tissue is relatively thin, compared to the subcutaneous veins will be relatively prominent, the performance of the blue veins is more obvious. 2. Mastitis: If you don’t pay attention to cleaning your breasts and don’t pay attention to hygiene, your nipples will be susceptible to bacterial infections, and the bacteria will retrograde and then mastitis will occur, accompanied by swelling and pain. So the bruises around the breasts will be more obvious. 3. Breast Hyperplasia: If you are in the attack period of breast hyperplasia, due to the compensatory hyperplasia of the mammary glands, nodules and lumps will be formed, which will affect the local venous blood return, manifested as a single vascular dilatation, and bruises around the breasts may appear. At the same time, when breast cancer and breast fibroadenoma are large, they affect local venous return, and venous dilatation appearing as bruises is also evident. Breast vascular disease can also be manifested as bruises around the breast, which need to be carefully identified. If there are blue veins around the breast, it is recommended to consult a doctor in a timely manner, after a clear diagnosis under the guidance of the doctor to standardize the treatment.