Question: After "sucking" Henderson, he's almost fully regenerated. Why does his mouth become decayed again when he kisses Evie?
Answer: You answered it, he was almost fully regenerated, just some minor skin aliments.
Question: What's the significance of the tattoo on the hands of the medjai? Not the medjai symbol but the 3 lines?
Answer: The tattoos they have are various symbols that mark them as Medjai. The sequel, "The Mummy Returns" confirms this.
Yes, I know, but the tattoos on the top of the hands are different from the one on the forehead and the cheeks. It makes me think of pyramids.
I believe it's just that seal of the Medjai. I don't think there's much significance beyond that.
Chosen answer: No, but it sounds a bit like Cambridge or some other old institution. Bembridge actually exists as a village in England, but there is no mention anywhere of any institution or society named "Bembridge Scholars", so it's most likely something that was invented for the sake of the franchise, as they are mentioned in the second movie as well.
David Mercier