Chickenpox is a contagious respiratory disease caused by a virus, characterized by a rash. Initially, symptoms resemble those of upper respiratory infections such as coughing, runny nose, mild fever, and decreased appetite. Subsequently, maculopapular rashes appear on the scalp and face, which gradually develop into vesicles. These vesicles contain a clear fluid, surrounded by reddened skin and are accompanied by itching. Therefore, if a child exhibits symptoms of an upper respiratory infection followed by vesicular rash, it is important to seek medical advice promptly to confirm if it is chickenpox. If diagnosed with chickenpox, isolation is necessary to prevent cross-infection.