Blood nevus does not necessarily mean that the liver is bad, because blood nevus is formed by the dilatation of capillaries in the skin or mucous membrane, and usually occurs on the head, face, neck or trunk. The appearance of blood nevus in women in late pregnancy is a physiological phenomenon. If a patient with liver disease has a spider nevus, it indicates a serious liver lesion, which is usually caused by the weakening of hormone inactivation in the body, and should be seen in time. A spider mole is shaped like a spider, usually red in color, radiating from the center to the periphery, and will disappear automatically when pressed with a hard object.