The blood stream starts to back up. This increases pressure in the substantial vein, often known as the portal vein, that carries blood into the liver. This is known as portal hypertension. 对于许多人而言，静脉曲张只影响美观。蛛网纹也是如此，这是一种常见的轻度静脉曲张。但静脉曲张也可能引起酸痛和不适。有时还可能导致更严重的健康问题。 My medical doctor claimed they don't seem to be harm... https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-comprehensive-advice-for-optimal-results/