If the pattern of crying suddenly changes and your baby begins crying inconsolably out of the blue, there is likely an acute or new problem, which should be immediately evaluated in any baby. Once you're certain that the tears aren't due to fear, hunger, or discomfort, allowing … Don't be surprised if your anxious baby … Call a friend or relative and ask for advice; Let someone you trust take over for a while. Take deep breaths. Remind yourself that crying in itself won't hurt your baby … It's very common for even the best sleepers to suddenly start having problems, whether it's trouble falling asleep at bedtime or abruptly waking up during the night. Your baby … Put on quiet music to distract yourself. Put your baby down in a safe place and let him cry for a while. Another common reason for sudden crying is that your child is seeking attention, Dr. Spinner says.

Starting at age 6 months, separation anxiety can cause babies to wake up crying more than once during the night.