Why Does My Baby’s Poop Smell Like Vinegar?

Baby feces typically smells and looks like what your baby has eaten and drunk. Because of this, breastfed babies’ excrement either has a mildly sweet scent or has no smell at all.

Babies’ excrement gets more firm and starts to smell when they start eating solid food. However, it’s uncommon for babies to pass excrement that has an acidic or sour odor.

Your infant may not be digesting his meals properly if his excrement smells strangely like vinegar. It could also be a sign of a disease, such as a cold or stomach virus, or it might be an adverse reaction to milk or food.

When a baby is teething, some parents have even noted that their baby’s excrement starts to smell like vinegar.

Why does the excrement from my baby smell acidic?

The following factors may be to blame for children’s sour-smelling stools: Children don’t always absorb all of the nutrients. Because the child’s body cannot fully absorb the nutrients, excess sugar and nutrients irritate the stomach, which fosters the growth of infectious germs. An undeveloped digestive system or a lack of enzymes in the baby’s body to break down lactose from breast milk or formula are the causes of low nutritional absorption. The infant’s bowel motions may smell sour due to certain conditions as neonatal intestinal infections, parasitic infections, digestive abnormalities, etc. Children with an unbalanced intestinal microbiota (parameter 2.2) The microbiota in the intestines, commonly referred to as helpful bacteria, supports the body’s digestive system’s stability. Babies who are delivered vaginally receive a significant amount of helpful bacteria when they pass through the mother’s vagina, accelerating the completion of the intestinal microflora. Contrarily, as cesarean babies are not exposed to their mothers’ healthy bacteria, the intestinal microbiota is quickly out of balance, which allows for the growth of bad microbes and results in the baby’s stools falling. A nasty scent emanates from newborns. Children who receive antibiotic treatment also disturb the balance of the intestinal microbiota, which results in acidic, mucusy stools. 2.3. Crohn’s disease is a chronic inflammatory bowel illness that affects only children and can irritate and inflame any part of the digestive tract. The illness prevents nutrients from being absorbed, causing a kid’s bowel movements to smell sour and cause colic, irritability, and frequent fussiness; the youngster is lethargic, exhausted, refuses to breastfeed, has a fever, and is vomiting. If the illness is not promptly and effectively treated, the child’s ability to absorb nutrients, gain weight, experience malnourishment, and, more dangerously, reach significant developmental milestones will all be negatively impacted. important. 2.4. Cystic fibrosis is a genetic condition that blocks the lungs and digestive tract, resulting in thick, sticky mucus and digestive fluids. In newborns with cystic fibrosis, the flow of pancreatic enzymes to the small intestine to break down and absorb nutrients from food is impeded by sticky digestive fluids, which results in digestive discomfort. chemistry, including the fact that the child’s stool has a foul smell.

My six-month-old baby smells like vinegar—why?

Your baby’s body typically has scents, some of which are nice and some of which are unpleasant.

You’re undoubtedly accustomed to that distinctive newborn fragrance. According to Lynnette Mazur, a professor of pediatrics at the University of Texas Medical School in Houston, “‘Milky’ could be a suitable word for it.

Additionally, your kid could occasionally smell bad if he has vomited, has sweat or dirt stuck to him someplace. Young children’s short necks and excess body fat make it possible for food and perspiration to get caught in skin folds and develop an odor, according to Mazur. A bath in this situation ought to get rid of the odor.

However, some odors from a child’s body or urine may point to a health issue. Here are a few potential outcomes:

Untreated high blood sugar in diabetics leads to the potentially fatal illness known as diabetic ketoacidosis. It can cause a coma, brain enlargement, and even death if untreated. It is the main factor in childhood type I diabetes mortality.

High levels of the amino acid phenylalanine in the blood are a symptom of the condition phenylketonuria (PKU). A youngster can recover if given early treatment with nutritional therapy. However, PKU left untreated can cause behavioral issues, intellectual incapacity, convulsions, and psychiatric illnesses.

Trimethylaminuria. Trimethylamine, a substance in the body, cannot be broken down in people with this hereditary condition. (Trimethylamine is responsible for the smell of fish.) Even though there are no additional symptoms, the illness can cause sadness or social issues.

Type 1 tyrosinemia. A high concentration of the amino acid tyrosine is present in the blood when this illness first appears in infancy. Weight loss, liver illness, or serious neurological issues are warning signs. Tyrosinemia type 1 can be fatal if left untreated.

maple sugar The inability of the body to metabolize some amino acids results in urine illness. Babies with the condition have convulsions, poor feeding, vomiting, and even brain enlargement. If a child is properly diagnosed and treated, they can recover. The illness may be fatal if not identified and treated in a timely manner.

With isovaleric acidemia, several proteins can’t be effectively digested. Vomiting, drowsiness, and coma are the results of this syndrome. Diet low in protein is part of the treatment.

Type II glutaric acidemia. The body’s capacity to digest proteins and lipids for energy is compromised by this disorder.

You should contact your child’s doctor for help if you notice any of these or other odd odours. Remember that the majority of these ailments are extremely uncommon, and the smell may have another cause.

Some kids might smell differently, which could be a sign of a distinct medical condition. When puberty sets in for children, they may begin to smell strongly. The child may be experiencing “precocious puberty” if this occurs sooner than typical.

Before the age of eight, girls who experience early puberty may start to smell, develop breasts, or grow body hair. Boys under the age of nine who exhibit identical developmental symptoms are thought to be experiencing premature puberty. If you have any worries about whether your child is developing normally, speak to your child’s doctor.

When should I be concerned about a baby’s odor?

The majority of breastfed babies’ excrement doesn’t smell, however some formula-fed infants may have a faint odor. This is possibly the only positive aspect of infant poop. Naturally, as solids are introduced, everything changes. However, if your baby’s excrement smells really bad, it may indicate that they have an allergy to anything they’ve eaten. It is advised to get in touch with your child’s pediatrician if a strong smell lasts for several days and ask if an allergy test is required.

Even while I recognize it can be awkward to bring up, your child’s excrement really is a window into their health. Additionally, everyone poop, as the good text instructs.

What does poop from a baby with lactose intolerance look like?

Weak stools Sometimes, two hours after ingesting milk or any other dairy product, your child may pass loose, watery, yellow, and green-colored feces. This can indicate that the infant has lactose intolerance.

When a newborn smells vinegar, is it okay?

You may have always used white vinegar to clean your home because it is so effective at getting rid of grime of all kinds. For example, it works well to thoroughly clean your washing machine and disinfect your home gym equipment. Additionally, it is quite natural. There are no negative environmental repercussions because it doesn’t leave behind any poisonous residue. But you might be wondering if it’s safe around infants and young children.

Naturally, it is. No harmful vapors that could damage the lungs are released into the atmosphere by it. Since it’s natural, there aren’t any potentially dangerous elements in it.


Despite not being poisonous, white vinegar is acidic (the acidity is greater than 25%), thus you need to be careful where you keep it. It can upset the stomach if swallowed, and prolonged contact with sensitive skin might irritate some people. If your child ingests vinegar, give them a thorough mouthwash with water. After that, give the kid some milk or water to soothe their upset stomach. Simply wash it with mild soap and water if vinegar comes in touch with the skin.

Rethink baby’s diet

You can alter your baby’s nutrition in order to lessen diaper rash. Her already sensitive skin can become even more sensitive to certain foods, which can exacerbate diaper rash symptoms. Diaper rash is frequently made worse by acidic meals. Foods with a lot of sugar and fat might also be harmful. On the other hand, diets high in starch can lessen diaper rash.

Acidic foods to avoid

If your infant developed diaper rash, you might want to consider removing these foods from her diet until the signs go away:

  • Fruits and liquids with citrus
  • Tomatoes and goods made with tomatoes (this includes foods like spaghetti sauce)
  • Strawberries
  • Pineapple
  • Grapes
  • Raisins

Protect against diarrhea

The last thing you want to do is add diarrhea or loose stools to the situation when your infant has diaper rash. While every infant is unique, the following foods should be avoided since they frequently cause infant diarrhea:

  • formula made with cow’s milk
  • fruit juice
  • Apple juice
  • Cherry nectar
  • Apricots
  • Peaches
  • Pears
  • Fruit and juice from prunes

Foods that are good for diaper rash

Starches are OK for baby to eat if she is experiencing diaper rash symptoms because they are simple to digest and add bulk to the stool. Pasta and fermented whole grains are appropriate for babies who are eating solid foods. Soft-boiled eggs that have been cut up and plain yogurt with probiotics are other items that are gentle on diaper rash.

Keep in mind that infant cereal isn’t limited to plain rice cereal. She can try cereal prepared with healthful grains like brown rice, quinoa, or oats. The following foods are some more starchy possibilities for babies:

  • Potatoes
  • Rice
  • Crackers
  • toast or bread
  • Plantain
  • lentils or beans

B.R.A.T. diet

You’ve probably heard of the BRAT diet if your baby has ever experienced diarrhea. Baby’s stools are made larger by feeding them this bland, easily digestible diet. The B.R.A.T. diet also functions since reducing diaper rash symptoms is similar. Just keep in mind to cut back on items that bulk up her diet as the symptoms of her diaper rash subside to prevent constipation.

How can you tell whether your infant has GERD?

When stomach contents rise back up into the esophagus, acid reflux occurs.

The tube that moves food from the throat to the stomach is called the esophagus. There is a ring of muscle that typically opens as you swallow near the bottom of the esophagus where it connects to the stomach. The lower esophageal sphincter is the name for this band of muscles (LES).

Stomach acids and other digestive secretions may partially shut the LES, allowing them to reflux back up into the esophagus.

Because their LES could be undeveloped or weak, infants are more likely to have acid reflux. More than half of all newborns are thought to experience acid reflux to some extent.

The syndrome typically peaks at 4 months of age and disappears naturally between 12 and 18 months.

Rarely do an infant’s symptoms last longer than 24 months. If they continue, it can be an indication of the more serious disorder gastroesophageal reflux disease (GERD). The 10 most typical indications of baby GERD, though they can vary, include:

  • vomiting and spitting up
  • unwillingness to eat and issues swallowing or eating
  • agitation while eating
  • hiccups or watery burps
  • not gaining weight
  • unnatural arching
  • coughing frequently or recurring pneumonia
  • choking or gaging
  • heartburn or chest pain
  • disrupted slumber

1. Vomiting and spitting up

For infants, spitting up is commonplace. Forceful spitting up, however, might be a sign of GERD. This is especially true if your child is above 12 months old and continues to vomit up violently after meals.

Spitting up blood, green or yellow liquid, or something that resembles coffee grounds can also be an indication of GERD or other, more severe conditions.

Normally, spitting up causes no pain. After throwing up, your kid should still seem content and healthy. Forceful vomiting or spitting up causes more pain and is usually followed by whining and weeping.

2. An unwillingness to eat and trouble swallowing

If your baby feels pain when eating, they could refuse to take a bite. The irritation that develops as the stomach contents rise back up into their esophagus may be the cause of this pain.

3. agitation while eating

During feedings, babies with GERD may also begin to weep and scream. The response is typically brought on by esophageal or abdominal discomfort.

4. Hiccups or wet burps

Infants that burp or hiccup while spitting up liquid are said to have wet burps or wet hiccups. This could be a sign of GERD or, less frequently, acid reflux.

5. Lack of weight growth

If you have GERD or acid reflux, you may experience excessive vomiting or poor feeding, which can lead to weight loss or failure to gain weight.

6. An unusual arch

Infants’ bodies may arch during or right after eating. This is believed to be related to a burning discomfort that is brought on by an accumulation of stomach fluid in the esophagus.

An independent neurologic issue could exist with abnormal arching. If your infant also spits up or refuses to eat, it may be a sign of GERD.

7. Repeated pneumonia or persistent cough

Due to acid or food entering the back of the throat, your infant may regularly cough. Inhaling the vomited food into the lungs and windpipe is another way it might cause pneumonia, either bacterial or chemical.

Asthma and other respiratory conditions might also worsen as a result of GERD.

8. choking or gag reflex

When stomach contents flow back into the esophagus of your infant, they can spit up or choke. It could get worse depending on how your baby is positioned during nursing.

The stomach’s contents are held down by gravity. For at least 30 minutes after feeding your baby, it’s ideal to keep them upright to prevent food or milk from refluxing.

9. Heartburn or chest pain

The esophagus lining may become irritated by regurgitated stomach contents, leading to heartburn.

Although it could be challenging to spot in infants, this is one of the most typical indicators of acid reflux in older children and adults.

10. Sleep disturbance

Your kid may have more difficulty sleeping through the night if they have GERD or reflux.

To give your baby’s stomach time to completely settle before night, try to feed them well in advance. There are additional techniques to put your baby to sleep.

If you suspect your kid has GERD, it’s crucial to consult a physician or baby doctor.

The doctor can confirm a diagnosis of GERD or rule out other illnesses. They may also advise making certain lifestyle modifications to assist treat your infant’s GERD or acid reflux.