Letting babies “cry it out” is an oft-debated method of sleep training. However, most experts recommend some form of sleep training, (which may or may not include “crying it out”) around four months. Generally, parents of newborns are instructed to think of the various reasons for crying and are encouraged to soothe the baby, whether with food, cuddling or something else. But even healthy newborns can cry up to two hours a day, according to the Mayo Clinic. Sometimes, you can try everything in your repertoire and the baby will…just keep crying. If that’s the case, doctors will recommend just letting the baby “cry it out.” If you need to, you can calmly put the baby down and leave the room, make yourself some tea or even wear earplugs to reduce the stress of the crying on you. But if your newborn is crying for more than three hours a day, it may be colic and is definitely time to talk to a pediatrician.
Source: https://www.sheknows.com/