Why newborn crying peaks at two months — and when it signals more than a phase

The Period of PURPLE Crying can make healthy babies difficult to soothe, but parents should know the warning signs that require urgent medical advice and how to respond safely when frustration sets in.

Parents who find themselves pacing the floor with a crying newborn often fear they are missing something. In many cases, though, repeated, hard-to-soothe crying is part of normal early development rather than a sign that anything has been done wrong. Paediatric sources say this stage is commonly known as the Period of PURPLE Crying, a pattern of increased crying that usually begins in the first few weeks of life, becomes more intense around the second month, and then gradually eases as the baby grows. The point for parents is not to ignore distress, but to understand when a baby’s crying fits a typical pattern and when it may signal illness or injury.

The acronym PURPLE helps describe what this phase can look like. According to the Cleveland Clinic, the letters stand for Peak of crying, Unexpected, Resists soothing, Pain-like face, Long-lasting and Evening. That means a baby may cry more than expected, appear uncomfortable even when healthy, and be hardest to settle in the late afternoon or evening. JAMA Pediatrics says the crying pattern usually starts around three weeks of life, rises over the following weeks and improves by about three months, though other paediatric sources note it can continue to ease through months three to five.

What makes this stage especially difficult is that the baby may look upset even when nothing is seriously wrong. Healthline and WebMD both note that the crying can come without an obvious trigger and may not respond to the usual calming techniques. But the pattern alone is not enough to rule out a medical problem. Parents should first check for common needs such as hunger, a wet nappy, over-tiredness, discomfort from clothing, wind or a need for burping. If the crying seems linked to feeding, or if it is accompanied by poor feeding, vomiting, diarrhoea, fever or poor weight gain, paediatric guidance says a doctor should be contacted.

There are practical ways to get through the harder stretches. Gentle rocking, walking, holding, swaddling where appropriate and offering a dummy may help some babies, while a quieter environment can reduce overstimulation. The key is to keep the baby safe and to avoid escalating frustration when nothing seems to work. Health systems such as the NHS and Canadian paediatric guidance recommend that if crying becomes overwhelming, parents should place the baby in a safe sleeping space and take a brief pause to regain composure, ideally with another adult stepping in if one is available.

That safety message matters because a crying infant can push even calm adults to their limits. The Period of PURPLE Crying programme was developed in part to reduce the risk of abusive head injury, which can happen when a baby is shaken in frustration. Never shake, hit or roughly handle a baby, and make sure every caregiver understands that rule. After a baby settles, parents should also return them to safe sleep on a flat surface, on their back, with no loose bedding or soft objects nearby.

Not every crying spell should be assumed to be PURPLE Crying. A sudden change in the cry, difficulty breathing, marked sleepiness, a seizure, blue or grey colouring, refusal to feed, repeated vomiting, blood in the stool or any concern that the baby is in pain or unwell should prompt urgent medical attention. In babies under three months, a rectal temperature of 38C or higher is also treated as an urgent reason to seek care. The broader message from paediatric experts is simple: this phase is common, temporary and often frightening, but parents should trust their instincts if something feels out of the ordinary.