YSK: You may have to wait months before donating blood after getting a tattoo
YSK that getting a tattoo can temporarily make you ineligible to donate blood. The reason isn't the ink itself: improperly performed tattooing can expose you to blood-borne infections such as hepatitis. The waiting period depends on the country and how the tattoo was done. For example, the UK requires a 4-month wait, while U.S. rules generally require 3 months if the tattoo was done in an unregulated setting.
Why YSK: If you recently got a tattoo and want to donate blood, check your local blood service's rules first rather than assuming you're automatically eligible.