My baby has a black eye. Your baby probably banged into something or fell down. Almost all babies, especially those who are learning to crawl or walk , wind up with a few bruises now and then.
Minor injuries are part of exploring the world.
If your baby is in a playgroup or daycare center with other children or you have older children at home, he may have developed bruises from being hit with an object such as a toy. Watch carefully the next time your baby is around other children to make sure he isn't ending up in the line of fire too often. If he's in daycare and you think the bruises are excessive, talk to your provider about them. You'll never be able to prevent every blow, but if there's a little bully in your baby's crowd, you can take steps to keep her away from your little one. When your child is injured, small blood vessels in the soft tissue near the skin's surface rupture.