Main Symptoms and Causes of Jaundice in Newborns

What Is Newborn Jaundice and Why Does It Occur?

Newborn jaundice is a condition where the skin, mucous membranes, and the whites of the eyes develop a yellow tint. The primary cause is the buildup of bilirubin in the blood because the baby’s liver is not yet fully developed and cannot efficiently remove it. Typically, jaundice appears within the first 2–3 days of life and affects about 60% of full-term newborns.

Physiological jaundice, related to immature liver function, usually resolves on its own within 1–2 weeks. However, in some cases, jaundice may indicate more serious problems requiring medical attention.

The Physiology of Jaundice: How Bilirubin Accumulates

Bilirubin is produced during the breakdown of hemoglobin in the body. In newborns, the rate of red blood cell breakdown is higher than in adults, which raises bilirubin levels. The liver converts bilirubin into a water-soluble form so it can be eliminated with bile.

Why Doesn’t the Newborn’s Liver Manage This?

• Insufficient activity of the enzyme glucuronyltransferase, which is responsible for converting bilirubin.
• Immaturity of liver cells and the bile duct system.
• Limited food intake and dehydration, which slow bilirubin elimination.

Because of these factors, the level of indirect bilirubin in the blood can exceed the normal range by 5–15 mg/dL (85–255 µmol/L), leading to yellow discoloration of the skin.

When Is Jaundice Dangerous: Signs and Causes of Pathological Conditions

Pathological jaundice develops within the first 24 hours after birth or is accompanied by a rapid rise in bilirubin above 20 mg/dL (340 µmol/L). This condition requires urgent diagnosis and treatment, as high bilirubin levels can cause kernicterus—a severe brain damage.

Main Causes of Pathological Jaundice:

• Rh factor incompatibility between mother and baby.
• Blood group incompatibility (e.g., mother with O(I), baby with A or B).
• Newborn infections.
• Prematurity and congenital liver diseases.

How to Properly Monitor a Newborn with Jaundice at Home

Monitoring a baby with physiological jaundice is an important responsibility for parents. Attention should be paid to the following:

• Skin and eye white color: yellowing should appear from top to bottom and should not intensify after 5 days.
• Baby’s behavior: activity, appetite, frequency of urination and bowel movements.
• Body temperature: absence of fever or other infection signs.

Home Care Recommendations

• Frequent breastfeeding—at least 8–12 times a day—to stimulate bilirubin elimination.
• Exposure to daylight (not direct sunlight) for 30–60 minutes daily.
• Regular measurement of blood bilirubin levels by a pediatrician, especially in the first 5–7 days.
• Consult a doctor if jaundice worsens, or if the baby becomes lethargic or loses appetite.

Diagnostic and Treatment Methods for Jaundice in 2026

To determine bilirubin levels, a non-invasive bilirubinometer is used, such as the Dräger JM-105 model costing about 150,000 ₽, or through laboratory blood tests. Early diagnosis enables timely treatment.

Treatment Options:

• Phototherapy—the primary method for elevated bilirubin. Modern devices, like the «BiliLux 2026,» are available in major clinics in Moscow and Saint Petersburg.
• Exchange blood transfusion—used for very high bilirubin levels and risk of complications.
• Supportive therapy and addressing underlying causes (infection treatment, nutritional correction).

• 60% of full-term newborns experience physiological jaundice
• 2–3 days — average time jaundice appears after birth
• 15 mg/dL — approximate upper bilirubin limit in physiological jaundice
• 150,000 ₽ — price of the Dräger JM-105 bilirubinometer

Frequently Asked Questions

Key Takeaways

• Newborn jaundice is common and generally harmless, linked to liver immaturity.
• Timely diagnosis and monitoring of blood bilirubin levels are crucial.
• Pathological jaundice requires immediate treatment to prevent complications.
• Home monitoring includes checking skin color, feeding frequency, and overall baby condition.
• Modern treatments include phototherapy and, when necessary, exchange transfusion.

Conclusion

Newborn jaundice is a widespread condition caused by physiological characteristics of the baby’s body. Parents should learn to recognize normal signs and promptly consult a doctor if pathology is suspected. By following home care guidelines and maintaining regular pediatric consultations, the condition can be safely managed, ensuring the baby’s health during the first weeks of life.