Your child might have asthma if they exhibit the following symptoms: - Shortness of breath - A constant cough that is worsened by viral infections, exercise, cold air, or occurs while they are asleep - Chest tightness or congestion - Whistling or wheezing while breathing If your child has asthma, they are likely to have trouble sleeping, prolonged recovery or bronchitis following a respiratory infection, difficulty with play and exercise, and general fatigue.