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Rare Diseases

Maple Syrup Urine Disease

General information on maple syrup urine disease — an inherited condition managed through strict diet.

Pending clinical review — treat as general information only, not verified medical guidance. See our Medical Review Policy.

This is a medical emergency. Call your local emergency number or go to the nearest emergency room immediately — do not wait for symptoms to worsen, and do not try to manage this with diet or home care alone.

Maple syrup urine disease is a rare inherited condition where the body can't properly break down certain amino acids, which can build up and become dangerous, especially in infancy. It's named for the distinctive sweet smell it can cause in urine. It's identified through newborn screening in many places and managed with a strict, lifelong diet. This page is general educational information, not medical advice for your specific situation.

Signs to Recognize

Immediate First-Aid Steps

First aid only — this does not replace emergency medical care. Get professional help immediately.

Call Emergency Services If

  • A diagnosis needs a specialist metabolic team, not general dietary advice
  • Any illness in a child with this condition should be discussed promptly with their metabolic team, since fasting/illness can trigger a dangerous crisis

Frequently Asked Questions

What are the signs of Maple Syrup Urine Disease?

A distinctive sweet, maple-syrup-like odour in urine or earwax; Poor feeding in infancy; Lethargy or irritability; Developmental delay, if not managed; Seizures, in severe untreated cases.

What should I do for Maple Syrup Urine Disease?

Newborn screening for early detection; A strict, lifelong low-protein diet with special medical formula, closely guided by a metabolic specialist and dietitian; Careful monitoring during illness, since metabolic crises can be triggered by infections or fasting; Regular blood level monitoring.

When should I call emergency services for Maple Syrup Urine Disease?

A diagnosis needs a specialist metabolic team, not general dietary advice; Any illness in a child with this condition should be discussed promptly with their metabolic team, since fasting/illness can trigger a dangerous crisis.

This is general information, not a diagnosis or treatment plan. If you're experiencing a medical emergency, call your local emergency number or visit the nearest emergency room.
Book Urgent Follow-Up with a Pediatrician

This article is AI-generated for general educational purposes only. It is not medical advice, diagnosis, or treatment, and has not been independently verified by a licensed clinician unless stated above under "Medically reviewed by." Always consult a qualified doctor for guidance specific to you — you can book an online consultation on greenhealtheasy in a few minutes.

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