Surface antigen generally refers to hepatitis B virus surface antigen, and 0.14ng/ml is normal. Hepatitis B surface antigen is the glycoprotein on the surface of hepatitis B virus, and the source is the outer shell of hepatitis B virus. When the body is infected with hepatitis B virus, there is often a large amount of surface antigen of the outer shell remaining in the blood, which will lead to the elevation of hepatitis B surface antigen, and its normal range should be less than 0.5ng/ml, so the hepatitis B surface antigen of 0.14ng/ml belongs to the normal range. Elevated hepatitis B surface antigen can be seen in chronic hepatitis B, cirrhosis and liver cancer. If the value of hepatitis B surface antigen is abnormal, it is recommended to go to the hospital and ask the doctor to take into account the specific situation to make a comprehensive judgment, and it is not advisable to make a blind judgment on your own.