Causes of baby colic
The exact cause of colic cannot be identified; there are many possible causes, such as gastrointestinal problems, neurological development, psychological factors, and inflammation or dysbiosis.
Possible causes and remedies for baby colic:
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Gastrointestinal
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Plagiocephaly or “flat head”
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Hormonal
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Neurodevelopmental
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Psychosocial
1. Gastrointestinal
Many gastrointestinal disorders are identified as a possible cause of colic.
When experiencing colic, the newborn tends to pull up their legs and exhibit significant flatulence (intestinal gas).
An allergy to cow’s milk proteins or to other substances introduced by the mother through her diet, the production of intestinal gas, lactose intolerance, a poor latch during breastfeeding, or dysbiosis are all factors that can lead to gastrointestinal issues and cause colic.
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Cow’s milk protein allergy
Some specialists consider colic to be the result of an allergy to cow’s milk proteins in formula-fed babies.
More rarely, colic can be a reaction to specific foods in the mother’s diet in breastfed babies. In either case, these allergies or sensitivities can cause abdominal pain that can trigger colicky behavior.
The newborn has an immature gastrointestinal system, which can lead to difficulty breaking down and digesting proteins, causing intestinal inflammation and altering their flora.
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Intolerance to foods introduced into the mother’s diet (in case of breastfeeding)
Everything the mother ingests through her diet is also transmitted to the newborn.
A maternal diet high in cruciferous vegetables (such as cauliflower, broccoli, cabbage, etc.) or with onions, beans, and eggs, can cause increased gas production in the baby.
It is also recommended to eliminate any product containing milk, due to the relationship explained earlier between the digestion of milk proteins and the baby’s intestine.
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Intestinal gas production
Scientific studies indicate that the main cause of colic is intestinal gas, resulting from bacterial fermentation, voracious feeding involving the ingestion of air during suction, or breastfeeding difficulties.
Research has found that infant GERD (gastroesophageal reflux disease) can trigger episodes of colic.
Reflux is often the result of an underdeveloped lower esophageal sphincter—the muscle that prevents stomach acid from flowing back up into the throat and mouth—which can irritate the esophagus.
Symptoms include frequent spitting up, feeding difficulties, and irritability during and after feedings.
The good news is that most babies outgrow GERD by around 1 year of age (and colic usually disappears much sooner than that).
In a recent study, it was discovered that the stools of babies with colic showed a high level of fecal calprotectin, a marker of intestinal inflammation.
It is known that levels are higher in breastfed babies, but when these were analyzed separately from formula-fed babies, fecal calprotectin was consistently higher in babies with colic than in those without symptoms.
It was evidenced that the fecal microbiota was different in babies with colic, showing a lower number of Actinobacteria (of which 95% are Bifidobacteria).
Principal component analysis revealed that microbial \beta-diversity differed significantly.
Colon inflammation creates an intestinal environment that influences the newborn’s brain function and behavior.
2. Plagiocephaly or “flat head”
Plagiocephaly, or “flat head” in newborns, creates a positional alteration of the head, compressing the jugular foramen (a cranial opening) through which the vagus nerve passes.
This generates an alteration in the nerve signaling between the visceral system and the brain.
Plagiocephaly can lead to problems with breastfeeding and head mobility.
Consequently, digestive difficulties may arise, causing colic.
In these cases, Pediatric Osteopathy is an effective remedy for newborn colic, as it helps resolve postural issues that can interfere with digestion.
3. Difficulty during suction
One of the causes of colic can be the excessive ingestion of air during latching, which leads to increased air in the stomach and creates digestive difficulties.
If the newborn cannot achieve a proper latch on the breast or if the bottle nipple is unsuitable, the baby may become agitated and irritable, as well as feeding too voraciously.
It is necessary to check if there is any dysfunction at the cranial, cervical, jaw, or tongue level.
The first days of breastfeeding are very important and often difficult; the milk initially present in the breast is more “watery,” and only after a few days does the more nutritious milk, rich in fatty acids, arrive.
One should not give up immediately, but rather persist with the latch, even if the baby tends to let go.
Breast milk is produced based on the stimulation of the breast.
If the newborn has difficulty sucking, the cause could be due to weakness in the sucking muscles or dysfunctions of the TMJ (temporomandibular joint).
A dysfunction between the first cervical vertebrae can create a problem with head extension; consequently, the newborn cannot project the tongue, resulting in suction problems.
4. Hormonal
A study demonstrates how a high level of serotonin can favor the onset of colic in newborns.
Serotonin produced at the intestinal level has a direct relationship with mood and behavior.
5. Neurodevelopmental
Neurological development factors have also been proposed as one of the contributing causes of colic.
According to a theory by Dr. Harvey Karp, a developmental specialist, babies are born “too early”—by about 3 months (or one trimester)—which manifests as episodes of inconsolable crying.
According to his theory, newborns miss the comforting sensations of the mother’s womb (which can be mimicked by keeping them warm and calm, swaddling them snugly, placing them on their stomachs, and rocking them with a gentle motion).
In his book, he compares the human newborn to that of horses, highlighting how humans are born defenseless and unable to care for themselves, whereas a newborn horse begins to run on the very day it is born.
Episodes of inconsolable crying resolve in most children around 3 months of age, the point at which babies begin to “wake up,” accepting their environment, smiling, rolling over, and making vocal sounds.
6. Psychosocial
Emotional factors experienced by the newborn can contribute to the manifestation of colic.
Parental anxiety, maternal smoking, the age of the mother, and maternal or paternal depression are factors associated with colic.