You’ll usually spot blackish tar-like poop in a newborn. This substance is called meconium and is made up of things your baby ingested while in-utero, such as skin cells, mucus and amniotic fluid.
There’s absolutely nothing to worry about meconium-caused black poo – it will pass in a few days.
Another reason for your baby’s blackish poo could be that he is passing blood in his stools. Now before you panic, do keep in mind that this could very well be blood ingested from your own cracked, sore nipples as your breasts adjust to breastfeeding.
If you are a new mom and new to breastfeeding, make sure that your baby is latching on correctly as poor latch and positioning is one of the main causes for sore nipples and blood-tinged breastmilk.
Speak to a lactation consultant for tips, and to show you exactly how to position your baby. However, if you are really concerned, or not sure that the dark stool are caused by blood in your breastmilk, consult a doctor without delay.
One last reason for almost-black poo in a baby could be iron. If you are giving your little one an iron supplement, don’t be surprised to see dark green or black poop. But if your baby is not on an iron supplement, then please do check with a pediatrician to make sure the dark color is not caused by digested blood.