Hindi ko na-experience yan sa anak ko at honestly, dark circles or eye bags sa 2yo ay hindi talaga common, kaya better to get it checked with the pedia just to be sure! Could be allergy, sleep-related, or something else na need proper assessment lang, pero huwag mag-alala muna, most times it's nothing serious, dami lang nangyayari sa toddlers na di natin ma-predict haha.