Birthmarks - What are they?

Question

I personally have a Mongolian birthmark that consumes half my chest and right leg. I've heard of Mongolian birthmarks being indicators of someone being Jewish. But otherwise, it's just a mark.

Browsing online I saw this quote:

If it's true about birthmarks being the spot where you were killed in your previous life then I feel bad for whoever Caesar reincarnated is

I messaged the guy and he claims it's a joke and theres no source. Doesn't even believe in reincarnation. Thinking about it all now, it makes sense going back to Cain and Abel.

So what does Judaism have to say about birthmarks? Is the quote above true to some extent?

Answer 1

It has been quoted in the name of The Great Rebbe Moshe Tetelbaum of Uhel, Author of YISMACH MOSHE, that he said he remembered the different gilgulim (incarnations) which he had been in in his past lives. He is quoted to have said that in his first gilgul he lived as one of the sheep in the flock of Yaakov Avinu, and that he added that and once Yaakov had hit him with a strap for going out of line, and that he still had a mark on his shoulder, which he showed to his students, which was caused by the said lash from Yaakov's strap

(And some say that he remembered the tune that Yaakov sang while leading his flock).

This does not mean to say that every birthmark, Mongolian or other, is a sign of reincarnation, It is just an example of one such mark which told the story of the bearers incarnation.