If They're Tattoos Then Who Did Them? - Tumblr Posts

I heard theories about their meanings but I want their origin!! When did they get there. And how. If they're tattoos then who did them? Was it something that he wanted or was forced on him? He was an unwanted child and ate his twin and twins are a bad omen sooo idk sukuna Sukuna's tattoos Jujutsu Kaisen ryomen sukuna JJK