High transaminases are not allowed to donate blood. There are clear regulations for blood donation in China. In addition to age, blood pressure, weight and other conditions, the liver function of blood donors must be normal. Transaminases are one of the indicators of liver function, and elevated levels of these enzymes are often indicative of abnormal liver function. There are many diseases that cause liver function abnormalities, including viral hepatitis, alcoholic hepatitis, drug-induced hepatitis, etc. Some of these diseases, such as viral hepatitis, are contagious and can be transmitted through the bloodstream, so high transaminases do not allow blood donation. It is recommended to consult a doctor immediately to improve the relevant examinations (such as hepatitis B five, abdominal ultrasound, etc.) to make a clear diagnosis and timely treatment to avoid delaying the condition.