A mold is a multi-cellular fungus, it's different from fungi, fungi is single-celled.
There are roughly 1,000 species of mold in the United States — many of which aren’t visible to the naked eye. As tiny mold spores become airborne, they can cause allergic reactions in people who have mold allergies.
Mold allergy symptoms can be similar to those of other respiratory allergies:
- Nasal congestion
- Runny nose
- Irritated eyes
- Itchy throat
Mold can also trigger or aggravate asthma symptoms.