Aw, totally normal yan sa newborns, lalo na kung 22 days pa lang! A few of us mums noticed the same sa aming babies, kinda looks like bruising or shadow under the eyes, pero usually it's just how their delicate skin looks dahil super thin pa and the veins show through, or sometimes it's just shadows from how their eyes sit pa. That said, kung worried ka talaga or kung may other signs like swelling or kung parang uncomfortable ang baby, better check with your pedia just to be sure and para ma-ease your mind!