My son has these tiger claw stretch marks also they go across his spine which is weird to me because he is so thin he's not growing that way at all but is 6'1'' we use to have a hot tub so he was in it a lot and a pool, but the stretch marks are worse purple in color and a good width wide and the length is his width of his back from left to right, rib cage to rib cage at least a foot long. I know he is embarrassed about them and now we live in CA.so he wants to go to the beach with friends but always wears a t-shirt.
Just a concerned mom