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Bronchitis to cause voice problems is unusual. Laryngitis (inflammation of voice box) usually produces loss of voice. Acute laryngitis is due to vocal misuse, viral infections and exposure to noxious agents which lead to chronic laryngitis. Cigarette smoking, polluted air can also cause chronic laryngitis. Rarely systemic diseases like rheumatoid arthritis, gastrointestinal reflux disease and irritation from asthma inhalers can also cause this.
In inflammation of vocal cords, they become swollen and their vibration is affected. Treatment of infections, complete voice rest, inhaling humidifiers, cessation of smoking, and treatment of acid reflux disease in those people with it will help regaining the voice and limit the damage.
Dietary restrictions like avoiding caffeine, fatty foods, chocolate, peppermint and irregular meals will also help. Enough hydration with 6-9 glasses of water is important. Hope this information is useful. Thank you.