Inhalation may cause coughing, sneezing, labored breathing. Symptoms include shortness of breath, rapid breathing, and bluish skin coloration. It feels worse with deep breathing, coughing, sneezing, or laughing. In pigs swine influenza produces fever, lethargy, sneezing, coughing, difficulty breathing and decreased appetite. Assisted ventilation may be required in those with weakness of breathing muscles. Symptoms include loss of consciousness and abnormal or absent breathing. Heart function, breathing, and airway reflexes generally remain functional. This includes the heart and the muscles used for breathing. Treatment involves supporting a person's breathing and blood pressure. This entails ensuring that airway, breathing, and circulation are adequate. Signs include loss of consciousness and abnormal or absent breathing. He was taken to a hospital emergency room with "labored breathing". In people with myasthenia gravis, muscle weakness and breathing problems may worsen. The following morning, Duncan was breathing rapidly and complaining of "pain all over". Increases in blood sugar, breathing, and cardiac output are all required.