Ay, normal lang yan sa newborns, mommy! Ang mga sanggol kasi ay naturally may tight grip at tucked-in position pa lang sila from being in the womb, kaya ang thumbs nila ay madalas na bent or curled, especially pag mahimbing ang tulog nila. A few of us moms namin noticed din yan sa aming babies and it went away on its own after a few weeks as they started to relax and stretch more. But if you're worried or if it doesn't improve after a few weeks, or kung mukhang painful siya o hirap mag-open, best to check with your pedia just to be sure, okay?