Mold allergy is an immune reaction to spores released by certain molds. Exposure can occur indoors or outdoors and may cause symptoms throughout the year or during particular seasons. Damp buildings can also irritate the airways in people without a confirmed allergy.
Symptoms
- Sneezing and an itchy, runny or blocked nose
- Itchy, red or watery eyes
- Coughing, wheezing or chest tightness
- Worsening asthma or eczema
Seek urgent medical help for severe breathing difficulty, blue or grey lips, confusion or collapse.
Diagnosis
A healthcare professional will assess the timing of symptoms, the home or work environment and other possible triggers. Skin prick or specific IgE blood testing may support a diagnosis when clinically appropriate.
Reducing Exposure
Repair leaks, improve ventilation and address persistent dampness. Clean small areas of visible mold safely and follow local guidance for larger or recurring problems. Avoid disturbing mold if you have severe asthma or significant respiratory disease. Keep indoor humidity controlled and dry wet materials promptly.
Treatment
Treatment may include antihistamines, corticosteroid nasal sprays, eye drops and prescribed asthma or eczema treatment. Seek medical advice if symptoms persist, affect sleep or breathing, or are linked to a damp workplace or home.
Sources
Reviewed 28 August 2026.