I'm sure the blood type and allergies information would be welcome, but the "if dead" bit may be problematic if you don't follow it up with legal docs.

Recently there was a dilemma in an Emergency Room where a collapsed patient had a DNR tattoo on their chest: https://www.washingtonpost.com/news/to-your-health/wp/2017/1...

You’re absolutely right. That was a bit of a joke in reference to exactly that situation, and in retrospect it didn’t come through.

I have Turing’s Theta Combinator: http://dkeenan.com/Lambda/Graphical_lambda26.gif

Here’s an image of the tattoo itself, for those that might be curious: https://imgur.com/gallery/a9KhF

(I’m simultaneously very reserved about it, almost to the point of embarrassment with family members, while at the same time being very proud and admiring of it. Odd combination.)

Ironically, are you 100% sure you're allergic to Penicillin?

Hah, no actually, I’m half-joking here. I did get hives and bleeding from amoxicillin/clavulanate and my mother has had the same, so it’s probable, but I would definitely want to double-check anything I put on me!

The “If Dead” bit is tongue-in-cheek because it’s probably legally useless, although I guess something like that could function as a way to get in contact with the right people in the event of an emergency, whether for cryo or notifying kin.

Recommend to make it say chicken eggs instead.