Quick Answer
The PURPLE crying phase typically begins around 2 weeks of age, peaks between 4 and 6 weeks, and gradually eases by 3 to 4 months. It is a normal, temporary phase of newborn development — not a sign that something is wrong with your baby or your parenting.
What Is the PURPLE Crying Phase?
PURPLE crying is a term developed by the National Center on Shaken Baby Syndrome to describe the normal pattern of increased crying that all newborns go through. The word PURPLE is an acronym that describes the key characteristics of this phase:
- P — Peak of crying: Crying increases from around 2 weeks, peaks at 4 to 6 weeks, then gradually decreases
- U — Unexpected: The crying can start and stop without any obvious reason
- R — Resists soothing: Your baby may be difficult or impossible to soothe, even when all their needs are met
- P — Pain-like face: Your baby may look like they are in pain even when they are not
- L — Long lasting: Crying can last for hours at a time
- E — Evening: Crying is often worse in the late afternoon and evening
The Typical Timeline
- Around 2 weeks: Crying begins to increase noticeably
- 4 to 6 weeks: The peak — this is often the hardest period for parents, with some babies crying for 2 to 5 hours per day
- 6 to 8 weeks: Crying begins to gradually decrease for most babies
- 3 to 4 months: The phase typically resolves and crying becomes more predictable and easier to soothe
Every baby is different — some move through this phase more quickly, others take a little longer. But for virtually all babies, it does end.
Why Does PURPLE Crying Happen?
PURPLE crying is a normal part of neurological development. As your baby's brain and nervous system mature, they go through a period of heightened sensitivity and limited ability to self-regulate. It is not caused by:
- Something you are doing wrong
- Your milk supply or feeding method
- Colic in the traditional sense (though the terms are sometimes used interchangeably)
- Pain or illness in most cases
What Parents Can Try
- Respond consistently: You cannot spoil a newborn — responding to crying builds trust and security
- Try soothing techniques: Swaddling, gentle rocking, white noise, skin-to-skin contact, and feeding can all help, even if they do not always work immediately
- Take breaks: If you feel overwhelmed, it is safe to place your baby in their cot and step away for a few minutes to collect yourself. Never shake your baby
- Ask for help: Tag in a partner, family member, or friend so you can rest. The PURPLE crying phase is exhausting — you do not have to manage it alone
- Remember it is temporary: Keeping the timeline in mind — that the peak is around 4 to 6 weeks and it eases by 3 to 4 months — can help you get through the hardest days
When It's Worth Checking In With Your Pediatrician
PURPLE crying is normal, but speak to your pediatrician if:
- Your baby's crying is accompanied by fever, vomiting, or other signs of illness
- Your baby seems to be in genuine pain — arching their back, drawing up their legs, or crying immediately after feeds
- The crying does not ease at all by 4 months
- You are struggling significantly with the emotional demands of this phase — support is available and you deserve it
Key Takeaway
The PURPLE crying phase is one of the most challenging parts of the newborn period — but it is universal, temporary, and not a reflection of your parenting. It peaks at 4 to 6 weeks and typically resolves by 3 to 4 months. Knowing what to expect and why it happens can make it a little easier to get through.
Parents Also Ask
- Cluster Feeding Explained
- What Time of Day Does Cluster Feeding Most Commonly Happen?
- Does Cluster Feeding Mean My Baby Is Not Getting Enough Milk?
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your pediatrician or a qualified healthcare provider with questions about your baby's health.