A child experiences coughing while sleeping, with a breathing rate of 40 times per minute, accompanied by coughing. They have an allergic constitution and have suffered from pneumonia twice before, each time with symptoms of increased breathing rate, reaching up to 50 times per minute at the worst. They received nebulizer treatment today and have taken medication. It is recommended to pay attention to observation, avoid allergens, maintain good air circulation at home, avoid spicy foods, and encourage the child to drink plenty of water. These are the suggestions for this issue, hoping it will be helpful to you, and wish you a speedy recovery!