Hepatitis B is mainly transmitted through blood, semen and vaginal secretions when the infected person has a wound on his skin or mucosa. Of course, sex can be contagious. The best preventive method is to inject hepatitis B vaccine, which is generally not contagious in daily life. Living together, eating and shaking hands are not contagious.
When the condition is serious, the liver function is damaged, the intake, combination, secretion and excretion of bilirubin are damaged, and the concentration of bilirubin in the blood is increased. Bilirubin is excreted from the urine, and the urine turns yellow, which is the earliest manifestation of jaundice.
The concentration of bilirubin in the blood continues to increase, which can cause yellow staining of eyes and skin. Because of bile acid excretion disorder, the concentration of bile acid in blood increases, and too much bile acid is deposited on the skin, which stimulates peripheral nerves and can cause skin itching.
Extended data:
Chronic hepatitis B is caused by HBV infection. Hepatitis B patients and HBV carriers are the main sources of infection. HBV can be transmitted through mother and baby, blood and blood products, damaged skin and mucosa and sexual contact.
After being infected with HBV, due to the influence of virus factors, host factors and environmental factors, there will be different outcomes and clinical types. The common reasons for its development into chronic hepatitis B are as follows.
Baidu Encyclopedia-Chronic Hepatitis B