Dehydration in Newborns

Dehydration in Newborns: Signs You Must Not Ignore

A newborn's body is highly sensitive to water balance. Due to low weight and rapid metabolism, dehydration in infants can develop very quickly and pose a serious health threat. Being able to recognize its early signs is critically important for all parents.

Why Does Dehydration Occur?

Most often, dehydration is the result of insufficient fluid intake or excessive loss. Main causes:

• Feeding difficulties. Improper latching, insufficient milk from the mother, or an incorrectly chosen formula can lead to the baby simply not receiving enough fluid.
• Vomiting or diarrhea. Gastrointestinal disturbances cause the body to lose a large amount of fluid and electrolytes.
• High fever. Fever accelerates breathing and increases fluid evaporation through the skin.
• Overheating. Overly warm clothing or high room temperature cause the baby to sweat and lose fluid.

Concerning Symptoms of Dehydration

It is important to know the "red flags" that indicate dehydration. The sooner you notice them, the better.

• Decrease in the number of wet diapers. This is the first and most reliable indicator. Normally, a newborn should have at least 6–8 well‑filled diapers per day. Fewer than 6 is a warning sign.
• Changes in urine. Urine becomes concentrated, dark‑yellow in color, with a strong odor.
• Dry mouth and crying without tears. Mucous membranes become dry, and tears are absent during vigorous crying.
• Swollen fontanelle. The soft spot on the baby's head becomes noticeably swollen.
• Lethargy and drowsiness. The baby becomes extremely sluggish and is hard to wake.
• Loss of skin elasticity. If you gently pinch the skin on the belly, it returns to place very slowly.

When any of these signs appear, you should immediately consult a pediatrician. The main goal is to restore fluid balance, most often through frequent breastfeeding or supplemental feeding. Read more about newborn health in our articles.