Is It Colic or Just Gas?
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published American Academy of Pediatrics, Mayo Clinic, National Institute of Child Health and Human Development guidelines
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Digestive issues are common in infants and toddlers. If your baby is experiencing is it colic or just gas, here is what you need to know.
The short answer
Gas causes temporary discomfort that improves when baby passes gas or poops, while colic involves intense, inconsolable crying for 3+ hours at a time, at least 3 days a week, often at the same time each day. Gas is extremely common; true colic affects about 1 in 5 babies and typically starts around 2-3 weeks and resolves by 3-4 months.
Key takeaways
- Gas causes temporary discomfort that improves when baby passes gas or poops, while colic involves intense, inconsolable crying for 3+ hours at a time, at least 3 days a week, often at the same time each day. Gas is extremely common; true colic affects about 1 in 5 babies and typically starts around 2-3 weeks and resolves by 3-4 months.
- Usually normal when: Fussiness that comes and goes, related to gas or hunger
- Call your doctor if: Baby has a fever along with inconsolable crying
- Varies by age — see the age-by-age breakdown below
“The biggest concern with vomiting is dehydration. Young children can become dehydrated quickly, so it's important to replace fluids. Offer small amounts of an oral rehydration solution frequently.”
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What Parents Should Know
According to American Academy of Pediatrics, Mayo Clinic, National Institute of Child Health and Human Development guidelines, gas causes temporary discomfort that improves when baby passes gas or poops, while colic involves intense, inconsolable crying for 3+ hours at a time, at least 3 days a week, often at the same time each day. Gas is extremely common; true colic affects about 1 in 5 babies and typically starts around 2-3 weeks and resolves by 3-4 months. At 0-2 weeks, in the first two weeks, most fussiness is related to gas, hunger, or normal newborn adjustment. True colic typically hasn't started yet. If your newborn seems gassy, focus on feeding position, proper latching (if breastfeeding), and burping technique. Some fussiness in the evening is normal for all babies. It is generally considered normal when fussiness that comes and goes, related to gas or hunger. However, you should contact your pediatrician promptly if baby has a fever along with inconsolable crying.
Normal vs. Concerning
By Age
What to expect by age
0-2 weeks
In the first two weeks, most fussiness is related to gas, hunger, or normal newborn adjustment. True colic typically hasn't started yet. If your newborn seems gassy, focus on feeding position, proper latching (if breastfeeding), and burping technique. Some fussiness in the evening is normal for all babies.
2-6 weeks
This is when colic typically begins if it's going to happen. You'll notice a pattern: intense crying episodes that start around the same time each day (often late afternoon or evening), lasting for hours. The "Rule of Threes" helps distinguish colic: crying for 3+ hours, at least 3 days per week. Gas-related fussiness is more sporadic and shorter.
6-12 weeks
If it's colic, this is often the peak period. The crying can be extremely intense and difficult to soothe. With gas, baby usually calms after passing gas or with comfort measures. Colicky babies may pull legs up, arch their back, clench fists, and have a red face, but these signs can happen with gas too. The duration and intensity are the key differences.
3-4 months
Colic typically resolves on its own around this age, often improving suddenly. If "colic" continues past 4 months, it may actually be something else like reflux, food sensitivity, or gas. Talk to your pediatrician about persistent fussiness beyond this age.
What to Tell Your Pediatrician
- Describe when you first noticed is it colic or just gas and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if crying episodes that follow the "Rule of Threes" pattern.
- Mention if you're feeling overwhelmed or exhausted by the crying.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Fussiness that comes and goes, related to gas or hunger
- Crying that stops when baby is picked up, fed, or passes gas
- Baby is easily comforted with movement, white noise, or pacifier
- Fussy periods that vary in timing and duration from day to day
- Baby has plenty of calm, happy periods throughout the day
- Crying episodes that follow the "Rule of Threes" pattern
- You're feeling overwhelmed or exhausted by the crying
- Baby seems to have pain that common comfort measures don't help
- You want to rule out other causes like reflux or food sensitivities
- Baby has a fever along with inconsolable crying
- Crying is accompanied by vomiting, bloody stool, or severe diarrhea
- Baby seems weak, lethargic, or won't wake to feed
- You feel like you might hurt your baby due to frustration or exhaustion
What You Can Do at Home
- Keep track of when you notice is it colic or just gas — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that fussiness that comes and goes, related to gas or hunger — this is generally within the range of normal.
- At 0-2 weeks, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Keep your baby upright for 20-30 minutes after feeding. Note any patterns between feeds and symptoms.
- While monitoring at home, seek immediate care if baby has a fever along with inconsolable crying.
Related Resources
Excessive Crying Triage
Determine whether crying patterns need medical attention.
Poop Color & Texture Guide
What your baby's poop color and consistency mean, and when to worry.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is is it colic or just gas normal?
When should I call the doctor about is it colic or just gas?
When is is it colic or just gas normal?
What causes is it colic or just gas?
What should I mention to my pediatrician about is it colic or just gas?
Is is it colic or just gas normal at 0-2 weeks?
Is is it colic or just gas normal at 2-6 weeks?
Should I go to the ER for is it colic or just gas?
Does is it colic or just gas go away on its own?
References
- [1]Colic: What Parents Need to Know About Infant Crying (2024) American Academy of Pediatrics
- [2]Colic: Diagnosis, Symptoms, and When It Ends (2024) Mayo Clinic
- [3]Understanding Colic and the Period of PURPLE Crying (2024) National Institute of Child Health and Human Development
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Is It Colic or Just Gas?.
Things to mention
- Describe when you first noticed is it colic or just gas and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if crying episodes that follow the "Rule of Threes" pattern.
- Mention if you're feeling overwhelmed or exhausted by the crying.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Crying episodes that follow the "Rule of Threes" pattern
- You're feeling overwhelmed or exhausted by the crying
- Baby seems to have pain that common comfort measures don't help
Urgent signs to report immediately
- Baby has a fever along with inconsolable crying
- Crying is accompanied by vomiting, bloody stool, or severe diarrhea
- Baby seems weak, lethargic, or won't wake to feed
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 is it colic or just gas are normal. Talk to your pediatrician if baby has a fever along with inconsolable crying.
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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