what are symptoms of bronchitis
Cold & flu health centre. Bronchitis. Bronchitis is a common infection causing inflammation and irritation to the main airways of the lungs. Symptoms of bronchitis include coughing up yellow-grey mucus, sore throat, wheezing and having a blocked nose. Acute bronchitis may be responsible for the hacking cough and phlegm production that sometimes accompany an upper respiratory infection. In most cases, the infection is viral in origin, but sometimes it's caused by bacteria.