Reye's Syndrome: Symptoms Worth Looking Out For

15. Low Blood Sugar (Hypoglycemia)

In the early stages of Reye’s syndrome, the liver’s inability to regulate glucose levels can result in dangerously low blood sugar. Hypoglycemia is especially common in infants and young children and may cause tremors, sweating, irritability, or seizures. If not corrected, it can progress to unconsciousness or death. Unfortunately, hypoglycemia often flies under the radar because its symptoms can mimic general illness or fatigue. Blood sugar testing is essential in any child presenting with altered mental status post-viral infection. If you suspect low blood sugar—especially in a child who’s been vomiting or unusually sleepy—don’t wait to get medical help.

Reye’s syndrome doesn’t wait. It often strikes just as a child seems to be getting better—turning a normal recovery into a race against time. What begins with vomiting or fatigue can quickly spiral into seizures, confusion, and coma. That’s why knowing the signs isn’t just helpful—it’s life-saving. With 15 symptoms now outlined, this guide goes beyond the basics to spotlight early red flags and overlooked clues that could change everything. Whether it’s a mood shift, trouble walking, or a racing heartbeat, these signs matter. And so does action. If your child is recovering from a viral illness, especially after taking aspirin, even one suspicious symptom is reason to call a doctor. Early recognition and immediate care are the best defense. Reye’s is rare—but your vigilance makes it rarer still. Don’t wait for it to look serious. Trust your instincts, act early, and give recovery the safety it deserves.