Colicky babies can sleep, but they need extra help getting there because their bodies are working against them on several fronts. Gut inflammation, an immature internal clock, and heightened sensitivity to stimulation all conspire to keep a colicky infant wired and wailing during the hours you most need them settled. The good news is that a combination of physical soothing techniques, environmental adjustments, and sometimes dietary changes can meaningfully reduce crying and improve sleep, even if no single trick works like a switch.
Why Colic Makes Sleep So Difficult
Colic is not just “a lot of crying.” Research consistently shows that colicky infants have measurably different gut bacteria and higher levels of intestinal inflammation than calm babies. In one study, fecal calprotectin, a marker of gut inflammation, was about 95 micrograms per gram higher in colicky infants than in matched controls, and the bacterium Bifidobacterium, which is associated with digestive comfort, was dramatically reduced.1PubMed Central. Infant Colic Represents Gut Inflammation and Dysbiosis Colicky infants also show elevated blood levels of inflammatory signaling molecules like IL-8 and MCP-1.2PubMed. Infantile Colic Is Associated With Low-grade Systemic Inflammation In other words, these babies appear to be genuinely uncomfortable, not just temperamentally fussy.
On top of the gut issues, colicky infants tend to have delayed development of their circadian rhythms. In the first months of life, babies produce very little melatonin on their own, and recent evidence suggests colic may be linked to this delayed maturation of the body’s internal clock.3Somnologie. Melatonin in infants—physiology, pathophysiology and intervention options Without a functioning day-night signal, the baby has no biological nudge toward sleeping when the house goes dark. Colicky babies also show heightened reactivity across sensory domains, including touch, movement, and oral sensation, which means ordinary stimuli that a non-colicky baby would filter out can keep a colicky infant in a state of arousal.4PubMed Central. Comparison of sensory processing skills in 7-12 month old colic and non-colic infants
All of this matters for your approach to sleep. You are not dealing with a baby who simply needs better sleep hygiene. You are dealing with a baby whose gut hurts, whose internal clock barely exists yet, and whose nervous system is running hot. Strategies that account for all three of these problems will get you further than any single fix.
The Five S’s and the Calming Response
The most widely studied non-drug approach to soothing a colicky baby is the “five S’s” framework: swaddling, shushing (white noise), swinging (gentle rhythmic motion), side or stomach positioning (while held, not for unsupervised sleep), and sucking (a pacifier or the breast). A scoping review of the evidence found that these techniques trigger what researchers call a calming response, a measurable drop in heart rate and increase in heart rate variability, by recreating the sensory environment of the womb.5PubMed Central. The five “S’s” and the “SNOO” Smart Sleeper—non-pharmacological interventions (NPI) to promote sleep and reduce crying of infants: a scoping review Swaddling mimics the snug pressure of the uterine wall. Continuous white noise resembles the sound of blood flowing through the placenta. Rhythmic swinging imitates the motion the fetus felt from the mother’s breathing and movement.
The practical reality is that you usually need to layer several S’s at once. Swaddling alone may not do much for a baby who is in the throes of a colicky episode, but swaddling combined with loud white noise and gentle bouncing can be remarkably effective. A few things to keep in mind:
- Swaddling: Use a snug wrap around the arms and torso but keep the hips loose. Stop swaddling once the baby shows signs of rolling, which typically begins around two months.
- White noise: The sound should be continuous and roughly as loud as a running shower. Intermittent or soft nature sounds tend to be less effective because they do not mask the baby’s own crying.
- Motion: Small, fast, jiggly movements (think a vibrating car seat more than a slow rocking chair) work better during acute crying episodes. Once the baby is calming, transition to slower, rhythmic swaying.
- Sucking: If your baby takes a pacifier, offer it after feeding. The sucking reflex is deeply calming and can bridge the gap between the end of a feeding and the onset of sleep.
The calming response works unless the crying is driven by hunger, physical discomfort from a wet diaper or tight clothing, or an underlying medical issue.5PubMed Central. The five “S’s” and the “SNOO” Smart Sleeper—non-pharmacological interventions (NPI) to promote sleep and reduce crying of infants: a scoping review So rule those out first, then deploy the S’s aggressively.
Skin-to-Skin Contact and Infant Massage
Two other physical strategies have evidence behind them: kangaroo care (extended skin-to-skin contact, usually chest to chest) and colic-specific abdominal massage. A randomized controlled trial found that both techniques comforted and calmed colicky infants, with improvements in crying duration and sleep.6PubMed. Effects of colic massage and kangaroo care on infantile colic pain, crying and sleep duration: A randomized controlled trial These are not the same as general baby massage or casual holding. Kangaroo care means the baby wears only a diaper and is placed directly against your bare chest, usually under your shirt or a blanket, for a sustained period. The warmth, heartbeat, and pressure seem to regulate the baby’s nervous system.
Colic massage involves gentle, clockwise circular motions on the baby’s abdomen, sometimes combined with “bicycle legs” (gently pushing the knees toward the belly in an alternating motion). The theory is that this helps move trapped gas and stimulates the sluggish gut motility that colicky babies tend to have. Timing matters: doing the massage during a calm period, not at the peak of a screaming episode, is more likely to prevent the next bout than to stop one in progress.
Using Light to Build Your Baby’s Internal Clock
Because colicky babies often have underdeveloped circadian rhythms, one of the most underrated sleep strategies is deliberate light management. A scoping review on light exposure and infant circadian development found that more daytime light was associated with better nighttime sleep efficiency, meaning less nighttime waking and longer stretches of sleep.7PubMed Central. The role of light exposure in infant circadian rhythm establishment: A scoping review perspective A separate study of six- to twelve-week-old infants, right in the peak colic window, found that babies who slept well at night had been exposed to significantly more light in the early afternoon.8PubMed. The relationship between daytime exposure to light and night-time sleep in 6-12-week-old infants
What this means in practice: during the day, keep the house bright. Open blinds, go outside if weather permits, and avoid dimming the room for daytime naps more than necessary. In the evening, do the opposite. Dim the lights at least an hour before you want the baby to sleep, and keep nighttime feedings and diaper changes as dark and boring as possible. This is not just about establishing good sleep habits for later. For a colicky baby, it may actively help the immature melatonin system come online sooner.
Breastfed babies get an additional circadian advantage. Breast milk contains melatonin that follows the mother’s own day-night cycle, with low levels during the day and higher concentrations at night. This exogenous melatonin crosses the infant’s intestinal barrier, circulates into tissues, and helps regulate the baby’s sleep-wake rhythm.9PubMed Central. Development of the circadian system in early life: maternal and environmental factors Breastfed infants show more consistent nighttime melatonin levels, higher sleep efficiency, and a lower incidence of colic compared to formula-fed infants.10PubMed Central. Postnatal Development of the Circadian Rhythmicity of Human Pineal Melatonin Synthesis and Secretion If you are breastfeeding and pumping, this is a reason to label pumped milk with the time of day it was expressed and try to feed nighttime milk at night.
Dietary Changes for Breastfeeding Mothers
If you are breastfeeding a colicky baby, your diet may be part of the picture. A randomized controlled trial found that when breastfeeding mothers eliminated common allergenic foods (cow’s milk, eggs, peanuts, tree nuts, wheat, soy, and fish), their infants’ cry and fuss time dropped by about a fifth compared to mothers who made no changes, and nearly three-quarters of infants in the low-allergen group were classified as responders compared to just over a third in the control group.11Pediatrics. Effect of a Low-Allergen Maternal Diet on Colic Among Breastfed Infants: A Randomized, Controlled Trial Another trial focused specifically on dairy elimination through a Mediterranean-style diet and found that infants of adherent mothers cried an average of about 17 minutes per day, versus over an hour per day in the control group.12PubMed Central. Maternal Adherence to a Dairy-free Mediterranean Diet and Symptoms of Colic and Allergy in Exclusively Breastfed Infants: A Randomized-Controlled Study
Cow’s milk protein is the most commonly implicated culprit. It does not mean your baby has a full-blown milk allergy; rather, traces of cow’s milk protein passing through breast milk may irritate a gut that is already inflamed. A reasonable approach is to eliminate dairy for two weeks and track whether crying and sleep improve. If they do, you have your answer. If they do not, add dairy back and try eliminating other common allergens one at a time. This is tedious but can be life-changing for the subset of colicky babies whose symptoms are diet-driven.
For formula-fed babies, switching to an extensively hydrolyzed formula (where the cow’s milk proteins are broken down into much smaller fragments) is the analogous move. Your pediatrician can guide this and may also consider an amino acid-based formula if the hydrolyzed version does not help.
The Probiotic Question
You will see probiotics, especially Lactobacillus reuteri, recommended widely for colic. The evidence here is genuinely mixed, and the honest answer is that probiotics help some babies and not others. One trial found that L. reuteri supplementation added to standard care reduced daily crying by over three and a half hours and increased daily sleep by over five hours over a four-week period, compared to more modest improvements with standard care alone.13Pakistan Journal of Health Sciences. Comparison between Lactobacillus Reuteri Probiotic in Addition to Standard Care versus Standard Care Alone in the Treatment of Infantile Colic But a rigorous double-blind, placebo-controlled trial published in the BMJ found the opposite: infants given L. reuteri actually cried and fussed about 49 minutes per day more than the placebo group, with the effect driven largely by formula-fed infants.14PubMed Central. Treating infant colic with the probiotic Lactobacillus reuteri: double blind, placebo controlled randomised trial
The emerging pattern seems to be that probiotics may work better for exclusively breastfed infants, whose gut microbiome is already oriented toward certain bacterial communities, than for formula-fed babies. If you want to try a probiotic, L. reuteri drops are the most studied option, but go in with realistic expectations. Give it at least two to three weeks before deciding whether it is helping, and do not be surprised if the effect is modest or absent.
What Probably Will Not Help
Two popular over-the-counter remedies, simethicone (sold as gas drops) and gripe water, do not have evidence to support their use for colic. A clinical evidence review found no good trial data for gripe water and concluded that the trials on simethicone were too poor in quality to draw any reliable conclusions.15PubMed Central. Colic in infants A separate review stated flatly that simethicone has no role in decreasing colic symptoms, and the prescription antispasmodic dicyclomine, once occasionally used, is not recommended for infants under six months due to safety concerns.16PubMed. Infantile Colic: An Update
Gas drops are unlikely to cause harm, so if you have already been using them and feel they help, there is no medical reason to stop. But if you are buying them in hopes of a real improvement in colic-related sleep disruption, the data suggest you are better off investing your energy in the physical soothing and environmental strategies described above.
When to Talk to Your Pediatrician
Colic is a diagnosis of exclusion, meaning it is what you call the problem once you have ruled out everything else. Several conditions mimic colic closely. Cow’s milk protein allergy and gastroesophageal reflux disease, for instance, share symptoms like vomiting, fussiness, poor appetite, and sleep disturbances, and neither has a single definitive diagnostic test in infancy.17PubMed Central. Cow’s Milk Allergy or Gastroesophageal Reflux Disease-Can We Solve the Dilemma in Infants? If your baby’s crying is accompanied by vomiting, bloody or mucousy stools, poor weight gain, or fever, those are red flags that something beyond colic is going on.
Even without red flags, a visit is worthwhile if nothing you have tried has budged the crying after two or three weeks of consistent effort, or if the sleep deprivation is becoming dangerous for you. Pediatricians can order stool tests, try a formula change, or refer you to a pediatric gastroenterologist. They can also screen you for postpartum depression, which is worth doing proactively in this situation.
Protecting Yourself and Sharing the Load
The toll of infant colic on parents is severe and well-documented, yet it rarely gets discussed in articles about soothing techniques. Mothers of colicky infants score significantly higher on depression screening tools than mothers of non-colicky babies.18PubMed Central. Mothers’ postpartum psychological adjustment and infantile colic The connection runs through sleep: infant crying duration is strongly correlated with how poorly the mother sleeps, and poor maternal sleep in turn predicts depressive symptoms.19Journal of Health, Wellness and Community Research. Relationship Between Infant Colic, Maternal Sleep Disruption, and Postpartum Depression Symptoms in First-Time Mothers of Rawalpindi Mothers of infants who woke frequently had nearly seven times the risk of postpartum depression compared to mothers of infants with regular sleep patterns.20Türkiye Çocuk Hastalıkları Dergisi. The Coexistence of Postpartum Depression with Infantile Colic and Sleep Problems
Fathers are not spared. A study comparing parents of colicky and non-colicky babies found that fathers of colicky infants had stress, depression, anxiety, and bonding-difficulty scores roughly double those of control fathers.21PubMed. Distress in fathers of babies with infant colic When fathers shared equally in soothing responsibilities, they reported significantly higher parenting self-efficacy at both four and eight months, which suggests that splitting the work is not just fair but protective for both partners.22PubMed Central. Hush Now Baby: Mothers’ and Fathers’ Strategies for Soothing Their Infants and Associated Parenting Outcomes
The single most important safety message in the entire colic literature is this: if you feel overwhelmed, put the baby down in a safe sleep space (on their back, in a crib or bassinet, with nothing else in it) and walk away for a few minutes. The baby will cry, and that is okay. Programs designed to reduce abusive head trauma in infants focus heavily on normalizing the fact that some babies cry no matter what you do, and on giving parents explicit permission to set the baby down and take a break.23PubMed. Supporting parents, safeguarding infants: A qualitative evaluation of parental experiences with the ICON program to reduce abusive head injury in England You are not failing if you need to step away. You are doing exactly what the research says works to keep everyone safe.
Nighttime Feeding Strategies That Can Help
How you handle nighttime feeds can either support or undermine the circadian cues you are trying to build. If you are breastfeeding, the melatonin content of your milk naturally peaks at night, so feeding on demand during nighttime waking gives the baby a dose of melatonin right when it is most useful.9PubMed Central. Development of the circadian system in early life: maternal and environmental factors Keep the room as dark as you can manage, speak in a whisper or not at all, and avoid stimulation like diaper changes unless absolutely necessary. You want the baby’s brain to register nighttime feeds as nighttime events, not daytime events happening at the wrong hour.
If you are formula feeding, the circadian melatonin advantage does not apply, but the same principle of minimal stimulation holds. Some parents find that slightly warming the formula and offering it in a dim, quiet room reduces the time the baby stays awake during night feeds. Colicky babies who are formula-fed also tend to respond more to the physical soothing strategies, particularly white noise and motion, since they are not getting the regulatory boost that breast milk provides. Leaning harder on the five S’s during nighttime wake-ups can partially compensate.
For both breastfed and formula-fed infants, smaller and more frequent feeds sometimes help more than larger, spaced-out ones. A stomach that is too full can increase gas and discomfort, while a stomach that is too empty brings hunger-driven crying back sooner. Finding the rhythm that keeps the gut comfortable without overfilling it takes some experimentation, but many parents of colicky babies report that shorter, more frequent feeds, especially in the evening cluster-feeding window, reduce the intensity of nighttime crying episodes.