Whooping cough may cause phlegm, with such diseases may also appear cough, nasal congestion and other symptoms, such diseases have a certain degree of contagious, it is recommended that timely medical treatment. 1. Pertussis is a common respiratory infectious disease, with such diseases may cause phlegm, patients usually show cough, cough sputum, nasal congestion, runny nose and other symptoms, coughing will recur, coughing may cause nausea and vomiting; in addition to whooping cough will also cause fever, and some patients will have a sore throat. 2. This disease must be taken seriously, may cause pneumonia, bronchitis and other complications; this disease is most common in children, adults are less likely to suffer from the disease or mild symptoms, whooping cough has a certain degree of contagiousness, suffering from this disease should be away from the dense crowd. When such adverse symptoms occur, you need to consult a doctor for examination, under the guidance of the doctor’s advice, choose the appropriate treatment, to avoid delaying the condition.