Hepatitis B does not usually cause impotence. Hepatitis B is a viral hepatitis caused by hepatitis B virus, which induces liver damage is a systemic infectious disease. Due to the existence of individual differences in the clinical manifestations of viral hepatitis B overall similar, mainly fatigue, loss of appetite, anorexia, liver function abnormalities, some cases will also appear jaundice, but does not induce impotence and other symptoms affecting male sexual function. Impotence, also known as erectile dysfunction, refers to the persistent or recurrent inability to achieve or maintain a sufficient penile erection to accomplish a satisfactory sexual life. According to the cause of the disease can be divided into three categories: psychological, organic and mixed, of which mixed impotence is more common. Organic impotence can be further divided into vascular (including arterial, venous and mixed), neurological, endocrine and anatomical structure. Therefore, there is no causal correlation between impotence and hepatitis B.