When teeth first start to come in, for some babies they may have sore or tender gums. To help ease their teething pain, gently rubbing your child’s gums with a clean finger, a small, cool spoon or a wet gauze pad. You can also give the baby a clean teething ring or a frozen baby cloth to chew on. If your child is still cranky and in pain, you may want to consult your dentist or physician. Generally children have a full set of 20 primary teeth by the time they are three years old.