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What health risks can result from tattooing with unsterile equipment?

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Body modifications and mutilations Peruvian elongated skulls, trephined male (left) and intact female (right), c. 1000 bc.

When tattooing is performed under less-than-sterile conditions, it poses significant health risks due to the potential for transmitting bloodborne diseases. Because the process involves rupturing the skin with needles or other sharp implements, the use of unsterilized equipment can facilitate the spread of serious viral infections, most notably hepatitis and HIV.1

These pathogens are carried in and spread through contact with contaminated blood. Beyond the risk of infection, individuals may also experience allergic reactions to the tattoo pigments used during the procedure.21

To ensure safety and uphold the ethical principle of non-maleficence—the obligation to do no harm—it is essential that any body modification procedure adheres to strict sterilization protocols. This includes the use of sterile, single-use needles and the proper disposal of all sharp objects to prevent the transmission of infectious agents.2