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The Rule of Threes: How Colic Is Actually Diagnosed

A bald man in a pink shirt smiling and holding an infant against his shoulder in front of a wall of framed certificates

Parents are built to respond to a crying baby, feed them, change them, rock them, and the crying usually eases. Colic is different. It is crying that keeps going no matter what you try, and it happens often enough that it has an actual clinical definition behind it rather than just being a catch-all label for a fussy baby.

The Rule of Threes

Colic is generally defined using what's called the rule of threes: crying that lasts more than three hours a day, happens more than three days a week, and continues for more than three weeks, in a baby who is otherwise healthy and feeding well. Roughly one in four infants goes through this in their first few months, so if you are in the middle of it right now, you are far from the only family dealing with it.

What sets colicky crying apart from an ordinary hungry or wet-diaper cry is the tone and the timing. It tends to sound more urgent and higher-pitched, often clusters around the same stretch of the day, frequently the evening hours, and resists the usual soothing tricks, rocking, feeding, a fresh diaper. Along with the crying, colicky babies often clench their fists, arch their back, draw their legs up toward their belly, and pass gas or show a rumbling, distended stomach.

What an Exam Is Actually Looking For

The arching and stiffening pattern is not just discomfort, it is often the clearest clue to where the real issue sits. When we examine a colicky baby, we are looking closely at the neurospinal system, not just the belly, because that arching and craning of the neck is frequently the body's own attempt to release tension building up along the spine. A physical exam paired with INSiGHT scanning gives us an objective look at how a baby's nervous system is regulating, rather than relying on parent description alone.

Most families who come in for colic care have already tried a full run of dietary approaches by that point: formula changes, probiotics, gripe water, essential oils, dairy elimination for nursing mothers. When all of that has genuinely been tried and the crying continues, it points fairly clearly toward what's sometimes called neurogenic colic, meaning the tension and interference started in the nervous system first, rather than in the gut.

Why the Common Explanations Fall Short

The most common explanation offered for colic is gas or a food sensitivity, but colicky babies do not actually produce more gas than other infants, and true formula intolerance is fairly rare. A nursing mother cutting dairy from her diet rarely changes the total amount of daily crying in any meaningful way. Anti-gas drops, probiotics, and formula switches can offer some relief around the edges, but they consistently fall short of resolving the pattern on their own, which is often the moment parents start looking for a different explanation.

Where the Pattern Often Starts

Colic frequently traces back to what happened during pregnancy and birth. A stressful or difficult pregnancy can shift a developing baby's nervous system toward a more sensitized stress response before birth even happens. Birth interventions, forceps, vacuum extraction, a cesarean section, or induction, can create real physical tension in a newborn's upper neck and upper back, precisely the areas that house the nerves controlling latching, swallowing, sleep, and digestive motility. Even a delivery that looks completely uneventful from the outside can place meaningful strain on that area.

Why Colic Is Worth Addressing Directly

Persistent crying and disrupted sleep can affect a baby's early sensory and physiological development, self-soothing ability, and the bonding and feeding relationship between baby and parent. The ripple effects reach the whole household too, exhausted parents, disrupted work, strain on siblings and the relationship between parents. None of that makes colic dangerous in itself, but it is real enough, for baby and family both, to be worth a closer look rather than simply waiting it out.

Our Approach

We start by hearing your baby's full story, the pregnancy, the birth, feeding patterns, and everything you have already tried. From there, a gentle physical exam of the spine and nervous system, along with INSiGHT scanning when appropriate, helps us see exactly where tension is being held. Using Koren Specific Technique and Talsky Tonal Chiropractic, our doctors focus on the upper neck, mid back, and lower back, where the nerves involved in digestion and settling travel, with pressure lighter than you would use to check a piece of fruit for ripeness.

Common Misconceptions Worth Letting Go Of

  • That colic is just something babies grow out of and nothing more can be done in the meantime
  • That gas or food sensitivity is the whole explanation
  • That a formula switch or probiotic will fully resolve the crying
  • That cutting dairy entirely from a breastfeeding parent's meals will end the crying on its own
  • That colic happens at random and cannot be traced to anything

What Parents Often Notice as Care Progresses

Once the underlying tension starts easing, many parents describe a baby who settles faster in the evening stretch, feeds with less struggle, and shows less visible gas and spit up. Sleep often improves for the whole household, not just the baby, since a calmer nervous system tends to mean fewer overnight wake-ups for everyone. Every baby settles at a different pace, and our doctors track progress at each visit so the plan can adjust if something is not working the way it should.

Where to Go From Here

If your baby's crying fits the rule of threes, or even comes close to it, that pattern is worth a real look rather than a wait-and-see approach. Learn more about how we support colic and infant digestive issues, or get our free guide on the nervous system side of colic. When you are ready, book online with our doctors in Royal Oak, or call us at (248) 616-0900.

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