People with tattoos can donate blood. China’s blood donation law provides that healthy citizens are encouraged to donate blood without compensation, and does not stipulate that people with tattoos cannot donate blood, so people with tattoos are also able to donate blood. However, regardless of whether or not you have a tattoo, you will have to do the appropriate examination before donating blood, including physical examination and laboratory tests. The physical examination includes the donor’s weight, blood pressure and other physical indicators. If the donor’s weight is too low, for example, below 50kg for adult males and below 45kg for adult females, he or she can donate blood. If the blood pressure is too high or too low, they are also not able to donate blood. Laboratory tests include the five tests for hepatitis B, hepatitis C antibodies, syphilis antibodies, AIDS antibodies, liver function, etc. If there are abnormalities in the tests, you cannot donate blood. A person who is positive for hepatitis C antibodies indicates that the blood is infected with the hepatitis C virus and cannot donate blood at this time. If the donated blood is used by the patient, it may be transmitted to healthy people. Therefore, people with tattoos can donate blood, but they should also go through the appropriate tests before donating blood.