In Reye's syndrome, a child's blood sugar usually drops while levels of ammonia and acidity in the blood rises. The liver also may swell, and fats may build up. Swelling may occur in the brain. This can cause seizures, convulsions or loss of consciousness. The symptoms of Reye's syndrome usually start about 3 to 5 days after the onset of a viral infection. This may be the flu, known as influenza, or chickenpox. Or Reye's syndrome may develop after an upper respiratory infection such as a cold. Initial symptoms For children younger than age 2, the first symptoms of Reye's syndrome may include: For children younger than age 2,  Diarrhea. Rapid breathing.  For older children and teenagers, early symptoms may include: For older children and teenagers,  Vomiting that doesn't stop. Being sleepy or sluggish.  Additional symptoms As the condition progresses, symptoms may become more serious, including:  Irritable, aggressive or irrational behavior. Confusion or seeing or hearing things that aren't there. Weakness in the arms and legs or not being able to move them. Seizures. Excessive sluggishness. Decreased level of consciousness.  These symptoms need emergency treatment.
reye's syndrome  child's blood sugar drops levels ammonia acidity blood rises  liver may swell  fats may build up  swelling may occur brain  can cause seizures  convulsions loss consciousness  symptoms reye's syndrome start 3 5 days onset viral infection  may flu  known influenza  chickenpox  reye's syndrome may develop upper respiratory infection cold  initial symptoms children younger age 2  first symptoms reye's syndrome may include: children younger age 2   diarrhea  rapid breathing   older children teenagers  early symptoms may include: older children teenagers   vomiting doesn't stop  being sleepy sluggish   additional symptoms condition progresses  symptoms may serious  including:  irritable  aggressive irrational behavior  confusion seeing hearing aren't there  weakness arms legs being able move them  seizures  excessive sluggishness  decreased level consciousness   symptoms need emergency treatment
reyes syndrome