Winter Nasal Health: Dry Air, Cold, and Infection Protection

In winter the nasal mucosa faces two stresses: cold outside air and dry indoor air. Cold air (especially below -5°C) causes nasal vasoconstriction; an initial brief relief is followed by compensatory vasodilation — the cause of "winter rhinitis" reactive runny nose. The sudden rhinorrhoea when entering warmth from cold is this mechanism.

Indoor dry air is another problem. With central heating or electric heaters, relative humidity can fall to 20% (healthy room humidity 40-60%). In a dry environment nasal mucus production drops, the mucosa dries and cracks; this notably increases viral infection risk (dried mucosa does not filter viruses).

Practical effect: colds and flu rise in winter — not just because "viruses are more active" but because the nose's defence is weakened. Hence prophylactic nasal care before winter matters. Related overview: our general ENT services.

Keeping indoor humidity at 40-60% is the top winter nasal protection strategy. A hygrometer (humidity meter) is cheap and simple — 100-150 TRY device tracks your home humidity.

Humidifier types: 1) Cool mist (ultrasonic) — silent, energy efficient, but if not used properly causes scale (distilled water recommended over tap). 2) Warm mist — boils water to produce steam, lower scale risk; caution with children (burn risk). 3) Evaporative — fan and filter system, naturally hygienic, but noisy and needs filter changes.

Professional recommendation: ultrasonic + distilled water (weekly maintenance), running in the bedroom at night. A second unit for the living area gives consistent humidity. Clean weekly (mould and bacterial risk).

Natural humidification: 1) Houseplants (especially areca palm, peace lily — naturally humidify air). 2) A bowl of water by the bed (slow overnight evaporation — small effect but real). 3) Leave the bathroom door open after a shower (steam spreads through the home).

Isotonic saline nasal sprays and rinses are the most powerful, cheap, side-effect-free method of nasal care. Mechanism: salt-water at the same tonicity as the body physically clears mucus, allergens, viruses, bacteria and crusts inside the nose and hydrates the mucosa.

Three main methods: 1) Spray bottles (Sterimar, NeilMed, Rhinomer) — 2 sprays per nostril 2-4 times daily. Convenient, portable. 2) Neti pot — small teapot device; you pour water like a cup into one nostril and it flows out the other. Maximum cleansing, takes 2-3 tries to master. 3) High-volume rinse bottles (NeilMed Sinus Rinse, Nasal Wash) — pressurised flush of sinuses.

Preparation: buy a commercial product (sterile, safe). To make at home: 250 mL boiled and cooled water + 1.25 mL sea salt (¼ tsp) + 0.6 mL (a small pinch) sodium bicarbonate. Mix, cool, use. Do not use non-sterile tap water — rare but serious infection (Naegleria amoeba) possible.

Best for: allergic rhinitis, chronic sinusitis, post-op rhinoplasty patients (post-surgical nasal care), dry nose, smokers, the general winter population (preventive).

Upper respiratory infection (URI) frequency rises 3-5× in winter. Cold air + indoor crowding + dryness + weakened nasal defence creates ideal conditions for viruses. Prevention strategies:

1) Vaccines: flu vaccine (each season — ideally September-November; can be given through the season). COVID booster (if it has been a while). Pneumococcal vaccine for 65+ or chronic lung disease. These prevent or reduce severity.

2) Hand hygiene: wash hands frequently (20 seconds with soap); avoid touching face, eyes, mouth. Wash after public transport, on entering the office.

3) Mask use: mask use dropped after COVID but in winter crowded venues (transit, malls, hospitals), a mask reduces infection risk 50-70%. Surgical mask suffices; FFP2/N95 for high-risk groups.

4) Body health: enough sleep (7-8 hrs), regular exercise, balanced diet — immune system fundamentals. Vitamin D deficiency is especially common in winter; check serum vitamin D, supplement if needed.

5) Stress management: chronic stress raises cortisol and suppresses immunity — meditation, yoga, outdoor walks (even 30 min of daylight in winter helps). More detail: sinusitis page.

Allergic rhinitis sufferers: dust mite allergy peaks in winter — closed windows due to cold, less ventilation, mite levels rise. Strategy: anti-allergen mattress covers, frequent hot wash (60°C+), HEPA-filter vacuum, fewer carpets.

Septal deviation: in winter the blocked side feels worse — dryness + viral risk + heating + dry air worsen obstruction. If septoplasty is planned, winter is advantageous (low UV, less social activity).

Post-op rhinoplasty patients: in the first 3 months extra winter nasal care. Isotonic saline 3-4 times daily, humidifier always on, reduced heating. Mucosa heals more slowly in dry air.

Children: 3-7 year olds average 6-10 URI per winter. Normal and immune-strengthening; but indoor humidity, hand hygiene, sleep and flu vaccine (recommended from 6 months) reduce frequency.

Elderly: in 65+ patients URI complications (pneumonia, hospital admission) are higher. Pneumococcal + flu + COVID vaccines are essential. Bundle up outdoors but avoid overheated indoor environments.

In winter, a cold and mild sore throat usually resolve in 7-10 days. See a doctor when:

1) Fever >38.5°C lasting 3+ days, 2) Facial pain + purulent (yellow/green) discharge — possible sinusitis, 3) Breathing difficulty — alarm in children especially, 4) Nasal obstruction >14 days — sinusitis or septal deviation complication, 5) One-sided blockage or bloody discharge — possible structural pathology, 6) Recurrent sinusitis (4+ episodes/year) — chronic sinusitis or allergy workup.

Most common ENT diagnoses in winter: acute sinusitis, chronic sinusitis flare, allergic rhinitis flare, post-septal-deviation chronic obstruction, nasal polyps, vasomotor rhinitis, rhinitis medicamentosa (decongestant dependence — peaks in winter because patients use sprays heavily before season). Related reading: our Istanbul ENT services.