The first is a physiological change, often due to less subcutaneous fat on the chest, and if the skin is white, it will be very obvious, this situation does not require further examination and treatment. The second condition is pathological change. When the superior vena cava is compressed, the head, neck, and upper extremities will have impaired reflux, resulting in edema and dilatation of the veins in these areas, thus producing a bruise on the chest.