My 5 month old sons' hand and feet are ice cold and kinda bluish. he has always had cold feet but his hands have never been this cold.?

Normal finding: Babies most important job is to grow bigger so they are designed to avoid energy loss(heat) by shifting circulation away from the top of their skin of fingers, toes&ears to deeper skin.Stick the same bluish toes in warm water & they pink up.A better gage of oxygen flow is to open & look at the inside of the eyelid. Keep baby in a onezie with footies& this won't bother you or baby.

Capillary Refill: You can also check your son's capillary refill under his fingernails and toenails. Briefly, and gently, depress a nail until the skin underneath blanches, then let go and see how quickly the blood returns to it. It should almost instantly revert back after blanching. If there is a delay in any of the fingers/toes, see your child's doctor. If brisk, then he's fine but ok to cover hands.