Kernicterus explained — how untreated jaundice can escalate, and why it's rare

Posting as Porter Law Group, NY — medical info only.

Kernicterus — brain damage from extremely high bilirubin — is rare because it's so preventable. Routine screening and treatments like phototherapy catch the vast majority of cases before bilirubin reaches dangerous levels; fewer than 5% of babies with jaundice ever develop it, and most of those involve a delayed diagnosis or treatment gap rather than an untreatable case.

Early warning signs to know: extreme sleepiness, poor feeding, a high-pitched cry, and unusually low muscle tone.

More on prevention and what happens if it's missed: What Are the Most Common Birth Injuries Caused by Medical Errors?