Call your physician immediately if the rash changes to purple spots. Call within 24 hours if the rash becomes itchy or the rash lasts more than 3 days. Common symptoms of a severe allergic reaction are hives, shock, wheezing, stridor, and swelling of the mouth or throat beginning within 2 hours of the time your child received the vaccine. The symptoms include a stiff neck, muscle tenderness, and weakness. This reaction occurs mainly in immune-compromised children or the adults who care for them, usually within 30 days of when the vaccine was given.
Fevers mainly occur in young children.
Common symptoms of a severe allergic reaction are hives, shock, wheezing, stridor, and swelling of the mouth or throat beginning within 2 hours of the time your child received the vaccine. The chickenpox vaccine can cause pain or swelling at the injection site for 1 to 2 days. Some children may have a fever that begins 2 to 4 weeks after the vaccination and lasts 1 to 3 days. For fever or pain, give acetaminophen. A few children develop a mild rash at the injection site or elsewhere on the body.