Post-Nasal Drip: Why Mucus Runs Down the Back of the Throat and What Helps

Post-nasal drip is the commonest cause of chronic cough and the commonest reason for a throat that never feels clear. Here is what produces it, the allergic, infective and irritant causes, the treatments that work and the home measures that support them.

Normal Drainage, Abnormal Amount

The nose and sinuses produce a litre or more of mucus a day that drains backward and is swallowed unnoticed. Drip is noticed when the amount rises or thickens: a sensation of mucus at the back of the throat, frequent swallowing or clearing, a tickly cough worse at night and lying down, and a sore or hoarse throat from the irritation.

The Causes

Allergic rhinitis, seasonal or year-round, is the leading cause. Non-allergic rhinitis from temperature changes, strong smells, spicy food or hormonal shifts. Viral colds and the weeks after them. Chronic sinus inflammation with or without polyps. Dry air, which thickens mucus. Reflux, which mimics drip. Some blood pressure medications. Pregnancy.

Treatments That Work

For allergic causes, a daily steroid nasal spray is the most effective single treatment, with antihistamines added for sneezing and itch; both are available without prescription in most places. Saline rinsing clears mucus and allergens and improves the steroid's reach. Avoiding identified allergens. For chronic sinus inflammation, a doctor may add other measures. For reflux-driven symptoms, the reflux measures.

Home Support

Hydration thins mucus. Humidity at 40–50%. Head raised at night. Warm drinks. A soothing throat spray or lozenge for the irritated throat that drip leaves behind. Drip lasting over a few weeks, one-sided symptoms, facial pain, fever or blood needs a doctor, since sinus infection, polyps and rarer causes need their own care.

Where Breathiterol Fits

Breathiterol's demulcent mullein soothes the throat that post-nasal drip irritates, which our review page describes as comfort support alongside saline, steroid nasal sprays and allergen control that address the drip itself. Read the full breakdown on the Breathiterol official website, including ingredients, customer reviews and current pricing.

Key Takeaways

• Drip is normal drainage noticed when mucus rises or thickens.
• Allergy is the leading cause; colds, sinus inflammation, dry air and reflux follow.
• Steroid nasal spray plus saline rinse is the most effective combination.
• Hydrate, humidify, raise the head; see a doctor if one-sided, painful or prolonged.

Frequently Asked Questions

Is post-nasal drip the same as a runny nose?

Same mucus, different direction; drip drains backward and is felt in the throat.

Do antihistamines dry up drip?

They help allergic drip; older ones thicken mucus and dry the throat, so newer non-drowsy types are preferred.

Does Breathiterol treat post-nasal drip?

No; it soothes the irritated throat. Drip needs allergy or sinus treatment, as our review says.

Sources

• American Academy of Otolaryngology: Post-nasal Drip
• Cochrane: Saline irrigation for allergic rhinitis