Crying serves several useful purposes for your baby. But, sometimes the crying won't stop. It's unnerving at the very least, so what's a parent to do?Crying serves several useful purposes for your baby. It gives her a way to call for help when she’s hungry or uncomfortable. It helps her shut out sights, sounds, and other sensations that are too intense to suit her. And, it helps her release tension. But, sometimes the crying won't stop. It's unnerving at the very least, so what's a parent to do? Try to pay close attention to your baby’s different cries. You’ll soon be able to tell when she needs to be picked up, consoled, or tended to, and when she is better off left alone. You may notice that your baby has fussy periods throughout the day, even though she’s not hungry, uncomfortable, or tired. Wendy Sue Swanson, MD, discusses your baby's crying habits, what they mean, and the best ways to deal with a fussy baby.