Baby Vomiting at Night Only
The short answer
Vomiting that occurs primarily at night can have several causes. The most common include postnasal drip from a cold or allergies (mucus drains to the back of the throat when lying down, triggering gagging and vomiting), reflux (stomach acid flows back when lying flat), overeating at dinner, or coughing spells that trigger vomiting. If your child is otherwise well during the day and the vomiting is occasional, it is likely related to positioning and congestion rather than a stomach illness.
By Age
What to expect by age
Night vomiting in babies is most commonly caused by reflux (gastroesophageal reflux). When a baby lies flat, stomach contents can flow back up more easily. Other causes include overfeeding before bed, a cold with postnasal drip, or a food sensitivity. Keeping your baby upright for 20-30 minutes after the last feed and ensuring the crib mattress is flat (do not use wedges or inclines, as these are not safe) can help. If night vomiting is frequent, discuss with your pediatrician.
Night vomiting in toddlers is commonly caused by: postnasal drip from a cold, sinusitis, or allergies that triggers coughing and gagging when lying down; eating too much or too close to bedtime; or reflux. Cough-induced vomiting is very common in toddlers with respiratory infections. If your toddler vomits at night during a cold, elevate the head of the bed slightly and use saline drops before bed. Recurrent night vomiting without illness should be evaluated, especially if it occurs with headaches (rare but important to rule out).
What Should You Do?
When to take action
- Occasional vomiting at night during a cold due to postnasal drip and coughing
- Vomiting once after a particularly large dinner
- Spit-up or mild vomiting after a late bedtime feed in a young baby
- A single episode of night vomiting with no other symptoms
- Night vomiting is happening regularly (more than once or twice a week)
- Vomiting is interfering with your child's sleep and well-being
- Night vomiting occurs even when your child does not have a cold
- Your child complains of stomach pain or heartburn at night
- Recurrent morning headaches with night or early morning vomiting (needs evaluation)
- Vomiting with difficulty breathing, wheezing, or choking at night
- Vomiting blood or bile (green)
- Signs of dehydration from repeated vomiting (dry mouth, no tears, reduced wet diapers)
Sources
Related Resources
Related Digestive Concerns
Baby Vomiting Without Fever
Vomiting without fever in babies has many possible causes, and most are not serious. Common reasons include overfeeding, reflux, food intolerance, motion sickness, or a sensitive gag reflex. However, certain patterns - forceful projectile vomiting in a young infant, bile-stained (green) vomit, or vomiting that prevents any fluid intake - can signal conditions that need prompt medical attention.
Baby Reflux / GERD
Gastroesophageal reflux is very common in babies because the valve at the top of the stomach is still maturing. Most infant reflux is uncomplicated, meaning your baby spits up but is otherwise happy and growing well. True GERD, where reflux causes pain, feeding difficulties, or poor weight gain, affects a smaller number of babies and is very treatable.
Baby Always Congested (Stuffy Nose)
Babies are naturally noisy breathers because their nasal passages are very small. Many parents worry their baby is "always congested" when the sounds they hear are actually normal newborn breathing. True chronic congestion can be caused by frequent colds, dry air, or irritants. Saline drops and gentle suctioning are the safest and most effective treatments for infant congestion.
Baby Throws Up After Crying Hard
It is surprisingly common for babies and toddlers to vomit after intense crying. The forceful abdominal contractions during hard crying, combined with a sensitive gag reflex, can trigger vomiting. While it is alarming to witness, it is not dangerous and does not mean your child is sick. It is not a manipulative behavior - young children cannot control their gag reflex. The vomiting should stop once the crying stops, and your child should otherwise appear well.
My Baby's Belly Looks Swollen
A rounded, slightly protruding belly is completely normal in babies and toddlers due to immature abdominal muscles and their proportionally larger organs. However, if the belly becomes suddenly swollen, feels hard and tight, or is accompanied by pain, vomiting, or changes in bowel movements, it needs medical evaluation as it could signal gas buildup, constipation, or rarely, something more serious.
My Baby Has an Anal Fissure (Blood When Pooping)
A small streak of bright red blood on the surface of your baby's stool or on the diaper is most commonly caused by an anal fissure, which is a tiny tear in the skin around the anus from passing hard stool. Anal fissures are very common in babies and toddlers and usually heal on their own with simple measures like keeping stools soft. While this is rarely serious, any blood in your baby's stool should be mentioned to your pediatrician.