Asthma and cold air

The response may include cough, wheeze, chest tightness or breathlessness. It does not mean outdoor activity must stop, but recurring symptoms suggest your asthma control and preparation for exposure should be reviewed.

Breathing through the nose normally warms and humidifies incoming air. During exercise or hurried walking, mouth breathing sends colder, drier air directly towards the lower airways, where sensitive muscles may tighten and inflamed lining can become more irritated.

Wind, sudden movement between warm and cold spaces, respiratory infections and airborne irritants may add to the effect. Asthma commonly presents with symptoms that vary by trigger, so a repeated cold-weather pattern is useful information for your clinician.

Keep taking your prescribed preventer and follow any pre-exercise instructions in your asthma action plan. Warm up gradually, breathe through your nose when practical, and place a loose scarf or cold-weather mask over your nose and mouth to help warm inhaled air.

Carry your reliever where it remains easy to reach and check that it is usable before going out. Choose a sheltered route or move activity indoors when cold wind reliably causes symptoms. Avoid smoke and strong fragrances, which can compound airway irritation.

Arrange an asthma review if cold air repeatedly limits routine activity, wakes you at night or leads to increasing reliever use. A clinician can check inhaler technique, explore other triggers and update the action plan before further exposure.

Call local emergency services if breathlessness becomes severe, speaking full sentences is difficult, lips appear blue or grey, you become confused or drowsy, or the reliever fails to help as set out in your emergency plan. Move out of the cold if this can be done safely.

Ask how to prepare for exercise or travel in cold conditions, when to use prescribed medicine before exposure, and how to tell a manageable trigger response from a flare. Mention nasal allergy symptoms, persistent cough and any limits on work or sport.