Pharyngeal Acid Reflux Causes Dry Cough, Throat Irritation: Doctor's Advice

A common but often overlooked condition, "pharyngeal acid reflux," can cause persistent throat irritation and a dry cough, particularly when lying down, without the typical symptoms of heartburn. Dr. Chang Tsan-hsuan, a gastroenterologist at Shin Kong Hospital, explains that this "silent reflux" affects over half of sufferers who experience no stomach pain. The throat's lining is highly sensitive to acid, leading to swelling, morning hoarseness, and the bothersome dry cough.

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Over half of people with pharyngeal reflux experience no stomach pain.

To alleviate the sensation of a lump in the throat and the nagging cough, Dr. Chang recommends several lifestyle adjustments. Sleeping on the left side can help utilize the body's anatomy to prevent acid from flowing back into the esophagus. When experiencing throat dryness or irritation, drinking alkaline water with a pH of 8.0 or higher can neutralize stomach acid and quickly reduce discomfort. Crucially, he advises a fasting period of at least three hours before bedtime to prevent nighttime acid reflux.

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The throat's mucous membrane has almost zero defense against acid.

For those who find themselves needing a late-night snack, Dr. Chang suggests opting for easily digestible proteins that have a quick stomach-emptying time and are less likely to trigger acid production. Examples include unsweetened soy milk, boiled eggs, or steamed egg custard. He also recommends "acid-absorbing" starches like white toast, a small bowl of unsweetened oatmeal, or steamed sweet potato, which can help neutralize stomach acid and provide a sense of fullness. Conversely, he warns against common late-night culprits such as beef noodle soup, fried foods, spicy hot pots, chocolate, mint, and carbonated beverages.

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Sleep on your left side as much as possible.