Two kinds of red dots often appear on the body of hepatitis B patients, one is a small round red dot with a relatively complete periphery. The appearance of this small red dot is generally a manifestation of a more serious coagulation dysfunction in the body, which is commonly seen in advanced liver failure or cirrhosis, resulting in a significant decrease in platelets, and in this case, one should go to a regular hospital to check liver function, blood count and clotting time. Another kind of red dot is spider nevus, which has spider claw-like blood around the red dot. This is due to the metabolic dysfunction of estrogen in the liver of patients with liver disease, which increases the level of estrogen in the body, and spider nevus is the most common sign of liver disease patients, which is a manifestation of diminished liver function and requires high attention.