Bronchitis occurs when the mucous membranes that line the upper breathing tubes become inflamed. Acute bronchitis often follows a viral illness such as a cold or flu, and can last for several weeks. Chronic bronchitis may develop if a person has repeated bouts of illness that are not well cared for, or if other factors such as smoking, exposure to polluted air, and allergies have lowered the person’s resistance and made the lungs susceptible. Homeopathic remedies may help relieve discomfort caused by coughing and help the body overcome infection. Serious or prolonged bronchitis requires a physician’s attention.