Bronchitis is an inflammation of bronchi, the airway in the respiratory tract that carries air into the lungs. Its main symptom is a persistent cough that produces considerable quantities of phlegm. The other symptoms of bronchitis are coughing up extra mucus, wheezing and difficulty in breathing, apart from hoarseness, pain in the chest and loss of appetite. Bronchitis is usually classified into two types - acute bronchitis and chronic bronchitis. While the former is caused by viruses or bacteria and lasts for several days or weeks, the latter is a persistent, productive cough that lasts for at least three months and continues for two consecutive years. Mostly bronchitis is caused by an infection. Allergies and chemical irritations, such as atmospheric pollution and smoke of the cigarettes, are some other contributing factors. However, there are certain home remedies to cure a person of the ailment. Check out how to treat bronchitis naturally.