In people who have mold allergy, being exposed to mold (at work, home, or outdoors) causes the immune system to overreact.

Symptoms include cough, itchy, watery eyes, and hives. People who have asthma may experience wheezing and difficulty breathing.

Treatment involves avoiding mold exposure. Medications such as antihistamines, nasal sprays, and allergy shots can help relieve symptoms and manage asthma.