血管痣就是皮肤粘膜上的小动脉扩张的结果,小动脉扩张后酷似蜘蛛网,用铅笔尖压住“蜘蛛体”,网状形态立即消失。此痣小的如小米粒,大的有2～3厘米,数量少的1～2个,多则数百个;多见于胸部以上、面颈及上肢手背等部位。急性肝炎患者血管痣的发生率约1％左右,而慢性肝炎可达54％左右。血管痣的出现常和肝功能状态相平行,当肝功恶化时,血管痣可急剧增多;肝功好转后,此 Vascular nevus is the result of arteriolar dilatation on the skin and mucosa. When the arterioles expand, they resemble cobwebs. With the pencil tip, they suppress the spider body and the reticular morphology disappears immediately. This mole is small, such as small grains, large 2 to 3 cm, a small number of 1 to 2, as many as hundreds; more common in the chest, face and neck and upper limb back and other parts. The incidence of vascular nevus in patients with acute hepatitis is about 1%, while chronic hepatitis can reach about 54%. Vascular nevus often appear parallel to the state of liver function, when the deterioration of liver function, vascular nevus can be dramatically increased; liver function improved, the