Dabi Can't Cry | Fandom. During one of his manga fights, he reveals that his burns have actually destroyed his tear ducts, rendering him permanently unable to cry.

Why did Dabi bleed from his eye?

While walking towards the harbor, Dabi recalls Snatch and is seemingly moved by the hero's last words to him. Dabi says thinking about all the families he's affected has nearly driven him crazy. He wipes some blood from the patch underneath his eye as if he was crying.

Does Dabi have tear ducts?

Dabi cannot cry - both literally and symbolically - ever since his tear ducts burned up when he “died”.