ANCSLEEP BLOG

Understanding the Underlying Causes of Nighttime Coughing

Posted by Darian Dozier on Jun 7, 2025 8:00:00 AM

 

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Coughing at night can be frustrating and disruptive, preventing you from getting the restful sleep your body needs. If you find yourself waking up with a persistent cough, there may be an underlying cause that needs to be addressed. Understanding the reasons behind nighttime coughing can help you find relief and improve your sleep quality.

Common Causes of Nighttime Coughing

Postnasal Drip

  • What happens: Mucus from the nose and sinuses drips down the throat, triggering a cough reflex.

  • Symptoms: Sore throat, a sensation of mucus in the back of the throat, nasal congestion.

  • Triggers: Allergies, colds, sinus infections, or irritants like smoke and dust.

  • Solutions: Use a humidifier, saline nasal sprays, or antihistamines if allergies are involved.

Acid Reflux (GERD)

  • What happens: Stomach acid flows back into the esophagus, irritating the throat and causing coughing.

  • Symptoms: Heartburn, a sour taste in the mouth, hoarseness, and coughing that worsens when lying down.

  • Triggers: Spicy or fatty foods, caffeine, alcohol, eating too close to bedtime.

  • Solutions: Elevate your head while sleeping, avoid trigger foods, and consider antacids or medications prescribed by a doctor.

Asthma

  • What happens: Inflamed airways become irritated at night, leading to coughing and wheezing.

  • Symptoms: Shortness of breath, wheezing, tightness in the chest, coughing that worsens in cold air.

  • Triggers: Dust mites, pet dander, cold air, exercise, respiratory infections.

  • Solutions: Use an inhaler as prescribed, maintain a clean sleeping environment, and monitor triggers.

Respiratory Infections

  • What happens: Viral or bacterial infections cause inflammation and excess mucus production.

  • Symptoms: Persistent cough, fever, fatigue, congestion.

  • Triggers: Colds, flu, bronchitis, pneumonia.

  • Solutions: Stay hydrated, get plenty of rest, and seek medical treatment if symptoms worsen.

Allergies

  • What happens: Exposure to allergens causes an immune response, leading to coughing and irritation.

  • Symptoms: Sneezing, itchy eyes, congestion, postnasal drip, wheezing.

  • Triggers: Dust mites, pollen, pet dander, mold.

  • Solutions: Keep your bedroom allergen-free by using air purifiers, washing bedding regularly, and minimizing exposure to triggers.

Heart Failure

  • What happens: Fluid buildup in the lungs can cause a chronic cough, especially when lying down.

  • Symptoms: Shortness of breath, fatigue, swelling in the legs or feet, persistent nighttime coughing.

  • Triggers: Underlying heart conditions, high blood pressure.

  • Solutions: If you suspect heart failure, seek medical evaluation immediately.

Medications (ACE Inhibitors)

  • What happens: Some blood pressure medications (ACE inhibitors) can cause a persistent dry cough.

  • Symptoms: Dry, tickling cough that appears shortly after starting the medication.

  • Triggers: Common ACE inhibitors like lisinopril, enalapril.

  • Solutions: Consult your doctor about switching medications if coughing becomes severe.

Tips to Reduce Nighttime Coughing

  • Stay Hydrated: Drinking warm fluids can help soothe the throat and thin mucus.

  • Use a Humidifier: Moist air prevents throat irritation and dryness.

  • Elevate Your Head: Sleeping with an elevated head position can help with postnasal drip and acid reflux.

  • Keep Your Bedroom Clean: Reduce allergens by washing bedding frequently and using air purifiers.

  • Try Over-the-Counter Remedies: Cough drops, honey, or lozenges may provide temporary relief.

When to See a Doctor

If nighttime coughing persists for more than a few weeks, is accompanied by shortness of breath, fever, or significant fatigue, it’s important to seek medical advice. Identifying and treating the underlying cause can prevent long-term complications and improve your quality of sleep.

By understanding the root cause of your nighttime cough and taking the necessary steps to address it, you can enjoy restful, uninterrupted sleep once again.

If you or someone you know struggles with sleep, please click the orange button below to take a free online sleep test and talk with one of our sleep health professionals. 

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Topics: GERD, acid reflux

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