Spider nevus usually grows on the face and neck, back of the hands, upper arms, and forehead.
Spider nevus, also known as spider capillary dilatation, or arterial spider nevus, is named after its spider-like shape, and is characterized by a radial arrangement of capillary dilatation next to the nevus. Spider nevi usually appear in the areas where the superior vena cava is distributed, such as the face and neck, the back of the hands, the upper arms, the forehead and the shoulders, and vary in size. Spider nevi are usually caused by impaired liver function and diminished estrogen inactivation.
Spider nevus is usually an important sign in patients with liver disease, but it does not necessarily occur with liver disease; it can also appear in healthy people, such as children and pregnant women. Therefore, if you have similar symptoms as those mentioned above, please go to the hospital for further examination in time to avoid delaying your condition.