Newborn crying does not increase steadily or decrease steadily. It follows a curve, and knowing the shape of that curve changes how the hardest weeks are interpreted.
The shape of the curve
Crying typically increases over the first weeks after birth, reaches its highest point somewhere in the second month, and then declines over the following weeks.
The pattern has been described across very different feeding practices, household arrangements and cultures, which suggests it reflects development rather than care.
Parents encountering the peak often conclude something has gone wrong, because the baby was easier a fortnight earlier. The deterioration is the expected trajectory.
Evening clustering has its own logic
Crying concentrates in the late afternoon and evening for many babies, at the point when the household is least able to absorb it.
Newborns have no established circadian rhythm and are consolidating hours of accumulated stimulation, and the evening is when both adult patience and available help are lowest.
That coincidence makes the evening period feel disproportionately long, and it resolves with the curve rather than through changes to the evening routine.
Unsoothable crying is part of the picture
During the peak, bouts often begin without an apparent trigger and continue despite feeding, changing and holding. The baby may appear to be in pain without being in pain.
The label sometimes applied to this pattern describes the crying rather than identifying a cause, and the great majority of babies with it are found to be well.
That said, a change in the character of the cry, fever, poor feeding, vomiting, unusual floppiness or a baby who is difficult to rouse are reasons for prompt medical assessment.
The risk sits with the adult, not the baby
Prolonged inconsolable crying is the most common trigger for a caregiver losing control, and shaking an infant causes severe and often permanent injury.
Because the peak coincides with maximum sleep deprivation, the danger is highest exactly when tolerance is lowest, which is why safety messaging is attached to this period specifically.
Putting the baby down somewhere safe and stepping away for a few minutes is the standard advice, and it is presented as a legitimate response rather than a failure.
Support is the practical intervention
Because the curve resolves on its own, most of what helps is aimed at the adults rather than the baby: shared nights, someone else holding for an hour, and honest reporting of how bad it is.
Parents frequently underreport, since the crying feels like evidence of inadequacy. Naming it to a midwife or health visitor tends to produce practical help rather than judgement.
Persistent low mood, hopelessness or frightening thoughts alongside the exhaustion are separate from the crying curve and warrant contact with a health professional.