Why does a child with influenza B have severe coughing at night?

When a child with influenza B experiences severe coughing, parents should immediately take necessary measures. Ensure the child gets plenty of rest and remains in bed, and keep the indoor air as fresh as possible. Provide the child with an appropriate amount of water to help relieve the cough, but avoid cold drinks, which may adversely affect the gastric mucosa. Feed the child easily digestible foods such as porridge, rice soup, boiled eggs, and soups to help restore strength. If the cough worsens, seek medical attention promptly to ensure the child receives proper diagnosis and treatment.