Some of the symptoms are forceful vomiting that lasts for hours and gets worse instead of better, severe headaches, child seems to be in a stupor and just stares, rapid breathing, drowsiness, memory loss, disorientation, hallucinations. If your child has even one of these symptoms you should get medical attention for them immediately. Your child may not have all the symptoms and they may have only one of them. It is always best to be safe then sorry. The faster you get medical attention the better and the more chance your child will have for recovery.
Early diagnosis is critical because of the risk of brain damage and or liver damage.
If a child is diagnosed with Reye's Syndrome they are sent to a hospital where they can treat the symptoms that the child has. This is usually reversing the swelling in the brain. Since the cause of Reye's syndrome is not known it cannot be prevented. However, parents should never give their children aspirin or products containing aspirin for any illness that causes a fever. You can give them Tylenol, as it contains no aspirin.