Breath-holding spells happen because a baby’s autonomic nervous system, the part of the brain that controls breathing and heart rate, is still maturing. These episodes are involuntary reflexes, not deliberate behavior. About 5% of children experience them, typically starting between 6 and 18 months of age and resolving on their own by age 5 or 6. Despite how frightening they look, they are not harmful and do not cause brain damage or long-term neurological problems.
What Happens Inside the Body
The name “breath-holding spell” is somewhat misleading because it implies the child is choosing to hold their breath. In reality, the spell is triggered by an involuntary reflex. When a young child cries hard in response to a strong emotion or a sudden shock, their immature nervous system can essentially overreact, temporarily interrupting normal breathing and, in some cases, slowing the heart rate dramatically.
The vagus nerve plays a central role. This long nerve runs from the brain to the heart and gut, and it helps regulate heart rate and breathing. In babies prone to these spells, the vagus nerve responds too strongly to certain triggers. It sends a signal that severely slows the heart, which can cause the child to stop breathing, go limp, and briefly lose consciousness. The body then resets itself within seconds to about a minute, breathing resumes, and the child recovers.
Cyanotic vs. Pallid Spells
There are two distinct types, and knowing the difference helps you recognize what you’re seeing.
Cyanotic spells account for over 60% of cases. They’re triggered by anger, frustration, or being told “no.” The child cries hard, goes silent, stops breathing, and their face turns blue or purple. The body may become rigid or limp before the child briefly loses consciousness. These spells resolve when the child takes a gasping breath and starts crying again. Interestingly, recent research has shown that intense laughter can also be a trigger, not just negative emotions.
Pallid spells are less common and follow a different pattern. These are triggered by a sudden fright or a painful experience, like a minor fall or bump. The child may cry only briefly or not at all before going pale, limp, and unconscious. In pallid spells, the vagus nerve slows the heart rate so dramatically that the child essentially faints. The color change is key: pale or white rather than blue.
Some children experience both types at different times.
The Role of Iron Deficiency
One of the most important and underrecognized factors behind breath-holding spells is low iron. A study of 180 children with cyanotic spells found that 61% had either iron deficiency or iron deficiency anemia. The lower a child’s iron and ferritin levels, the more frequent the spells.
The connection likely comes down to how iron affects oxygen transport and nervous system function. When iron stores are low, the body is less efficient at delivering oxygen, which may make the brain more vulnerable to the brief oxygen interruptions that happen during a spell.
The encouraging finding: iron supplementation significantly reduced the frequency of spells after just three months, with continued improvement at six months. Notably, even children who had low iron without full-blown anemia benefited from treatment. This means a child’s blood count might look normal on a basic test while their iron stores are still low enough to contribute to spells. If your child has frequent episodes, asking about a ferritin test (which measures stored iron, not just circulating levels) is worthwhile.
What a Spell Looks Like in Real Time
A typical episode follows a predictable sequence. The child encounters a trigger: a frustrating moment, a sharp pain, a sudden scare. They begin to cry, then go silent as their breathing stops. Within seconds, their skin color changes (blue for cyanotic, pale for pallid). Their body may stiffen or go completely limp. If the spell is severe enough, they lose consciousness briefly. In rare cases, the body may jerk a few times, which looks alarming but is not a seizure.
The entire episode typically lasts under a minute. After the spell breaks, the child takes a deep breath, color returns, and they usually resume crying or appear drowsy and disoriented for a few minutes. Some children fall asleep shortly afterward.
How Spells Differ From Seizures
Parents often worry they’re witnessing a seizure, and the brief jerking movements that sometimes occur at the end of a spell can reinforce that fear. The key distinction is the sequence of events. In a breath-holding spell, the trigger always comes first: the child cries, stops breathing, changes color, and only then might lose consciousness or have brief jerking. In epilepsy, loss of consciousness or convulsions occur without a clear emotional or pain trigger, and there’s no preceding cry or breath-holding.
Breath-holding spells also produce a normal brain wave pattern (EEG) between episodes, while epilepsy does not. If there’s any doubt, your pediatrician can help distinguish between the two based on a description of what happens before, during, and after the episode.
What to Do During a Spell
The most important thing is to stay calm, even though your instincts will be screaming otherwise. Lay your child on their side to keep the airway clear. Do not shake them, put anything in their mouth, or try to force them to breathe. Blowing a puff of air forcefully onto the child’s face can sometimes interrupt the reflex early, though this doesn’t work for every child.
The spell will end on its own. Once it does, comfort your child as you normally would. There’s no need to call emergency services for a typical spell in a child who has already been diagnosed, but the first time it happens, getting a medical evaluation is important to rule out other causes.
Why Some Children Are More Prone
Breath-holding spells tend to run in families. If one or both parents had them as children, the odds go up significantly. Beyond genetics, children with low iron are clearly at higher risk, and temperament plays a role too. Children who are more emotionally intense or reactive simply encounter their triggers more often.
Frequency varies widely. Some children have a spell once or twice in their entire childhood. Others have multiple episodes per week. Spells tend to peak in frequency between ages 1 and 3, when emotional regulation is at its most limited and frustration is a near-constant companion. As the nervous system matures and the child develops better coping skills, episodes become less frequent and eventually stop altogether. The vast majority of children outgrow them completely by school age, with no lasting effects on development or brain health.
Reducing the Frequency of Spells
You can’t prevent every spell, but a few strategies help reduce how often they happen. Addressing iron deficiency is the single most effective medical intervention, so having your child’s iron levels checked is a practical first step. Beyond that, keeping your child from getting overtired or overly hungry can lower the threshold for emotional meltdowns that lead to spells. Consistent routines help.
It’s also important not to let the fear of triggering a spell change your parenting. Children who learn that a spell gets them whatever they want may, over time, develop behavioral patterns that make episodes more likely. Setting normal boundaries and responding to spells with calm reassurance rather than giving in to demands keeps the situation from escalating in a different way.