When to Worry and When It Is Normal
Medically reviewed by Dr. Emily Torres, PhD, CCC-SLP · Pediatric Speech-Language Pathologist
Content reviewed against published CDC, AAP, NIH guidelines
Last reviewed:
Behavioral development varies greatly from child to child. If you have noticed when to worry and when it is normal, here is what you need to know.
The short answer
Learning to distinguish between normal developmental variation and genuine red flags is one of the most important skills a parent can develop. Most of the behaviors that alarm new parents, such as jerky movements, unusual sounds, or uneven development, fall well within the range of normal. True warning signs tend to involve loss of skills, complete absence of expected behaviors well past the typical window, or combinations of concerns rather than isolated quirks.
Key takeaways
- Learning to distinguish between normal developmental variation and genuine red flags is one of the most important skills a parent can develop. Most of the behaviors that alarm new parents, such as jerky movements, unusual sounds, or uneven development, fall well within the range of normal. True warning signs tend to involve loss of skills, complete absence of expected behaviors well past the typical window, or combinations of concerns rather than isolated quirks.
- Usually normal when: Your baby has occasional quirky behaviors that come and go and do not interfere with their overall development
- Call your doctor if: Your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk
- Varies by age — see the age-by-age breakdown below
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to CDC, AAP, NIH guidelines, learning to distinguish between normal developmental variation and genuine red flags is one of the most important skills a parent can develop. Most of the behaviors that alarm new parents, such as jerky movements, unusual sounds, or uneven development, fall well within the range of normal. True warning signs tend to involve loss of skills, complete absence of expected behaviors well past the typical window, or combinations of concerns rather than isolated quirks. At 0-3 months, newborn behaviors that commonly alarm parents but are usually normal include jerky or trembling movements, frequent hiccups, irregular breathing patterns during sleep, crossed eyes, and startling easily. True red flags at this age include a baby who is extremely difficult to rouse, does not respond to loud sounds at all, never makes eye contact, or is not feeding adequately. When in doubt, call your pediatrician; they expect and welcome these calls. It is generally considered normal when your baby has occasional quirky behaviors that come and go and do not interfere with their overall development. However, you should contact your pediatrician promptly if your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk.
Normal vs. Concerning
By Age
What to expect by age
0-3 months
Newborn behaviors that commonly alarm parents but are usually normal include jerky or trembling movements, frequent hiccups, irregular breathing patterns during sleep, crossed eyes, and startling easily. True red flags at this age include a baby who is extremely difficult to rouse, does not respond to loud sounds at all, never makes eye contact, or is not feeding adequately. When in doubt, call your pediatrician; they expect and welcome these calls.
3-6 months
At this age, normal variations that worry parents include asymmetric movement patterns that resolve, drooling without teeth, putting everything in their mouth, and inconsistent rolling. Red flags would include a baby who still feels very floppy or very stiff, has no interest in people or faces, does not smile socially, or cannot hold their head steady by four months.
6-12 months
Many parents worry when their baby does not crawl, but not all babies crawl and it is not a required milestone. Normal variations include scooting on their bottom, army crawling, or going straight to pulling up. Red flags include not sitting with support by nine months, using only one side of the body consistently, or not babbling or making consonant sounds by nine months.
12-24 months
Wide variation in walking and talking timelines causes the most anxiety in this period. Walking anywhere from 9 to 18 months is normal, as is having just a few words at 12 months. Red flags that warrant evaluation include not walking by 18 months, no words by 16 months, not following simple directions, loss of any previously acquired skills, or no pretend play emerging by 18 months.
What to Tell Your Pediatrician
- Describe when you first noticed when to worry and when it is normal and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you have a persistent gut feeling that something is not right, even if you cannot articulate exactly what.
- Mention if you notice a pattern of multiple small concerns that individually seem minor but together feel significant.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your baby has occasional quirky behaviors that come and go and do not interfere with their overall development
- Your baby is slower in one developmental domain but on track or advanced in others
- Your pediatrician has reviewed your concerns and provided reassurance based on an in-person examination
- The behavior you are worried about is something your baby does sometimes but not constantly
- You have a persistent gut feeling that something is not right, even if you cannot articulate exactly what
- You notice a pattern of multiple small concerns that individually seem minor but together feel significant
- Your baby seems behind in more than one developmental area simultaneously
- You want your pediatrician to formally screen your child's development to put your mind at ease
- Your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk
- Your child shows no response to their name by 12 months, no gestures like pointing or waving by 12 months, or no single words by 16 months
- You notice a sudden change in your child's behavior, alertness, or physical abilities
What You Can Do at Home
- Keep track of when you notice when to worry and when it is normal — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your baby has occasional quirky behaviors that come and go and do not interfere with their overall development — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Respond consistently and calmly to your baby's behavior. Maintain predictable daily routines.
- While monitoring at home, seek immediate care if your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk.
Related Resources
Frequently asked questions
Is when to worry and when it is normal normal?
When should I call the doctor about when to worry and when it is normal?
When is when to worry and when it is normal normal?
What causes when to worry and when it is normal?
What should I mention to my pediatrician about when to worry and when it is normal?
Is when to worry and when it is normal normal at 0-3 months?
Is when to worry and when it is normal normal at 3-6 months?
Should I go to the ER for when to worry and when it is normal?
Does when to worry and when it is normal go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss When to Worry and When It Is Normal.
Things to mention
- Describe when you first noticed when to worry and when it is normal and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you have a persistent gut feeling that something is not right, even if you cannot articulate exactly what.
- Mention if you notice a pattern of multiple small concerns that individually seem minor but together feel significant.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You have a persistent gut feeling that something is not right, even if you cannot articulate exactly what
- You notice a pattern of multiple small concerns that individually seem minor but together feel significant
- Your baby seems behind in more than one developmental area simultaneously
Urgent signs to report immediately
- Your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk
- Your child shows no response to their name by 12 months, no gestures like pointing or waving by 12 months, or no single words by 16 months
- You notice a sudden change in your child's behavior, alertness, or physical abilities
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of when to worry and when it is normal are normal. Talk to your pediatrician if your child has lost skills they previously had, such as stopping talking, no longer waving, or losing the ability to walk.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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