Mold spores cause health problems when they become airborne and are inhaled in large quantities. Everyone is exposed to mold in some concentration in the outdoor air. Indoor exposure to molds is not healthy for anyone. In particular, people with allergies, existing respiratory conditions or suppressed immune systems are especially susceptible to health problems from mold exposure. Additionally, infants and children, pregnant women and the elderly can be sensitive to the effects of mold exposure.
Some molds are more hazardous than others.
For some people, a small number of mold spores can cause health problems. For others, it may take many more. There are many symptoms of mold exposure. The extent of symptoms depends on the sensitivity of the exposed person. If you have any of these symptoms, and they are reduced or completely gone when you leave the suspect area, chances are you are exposed to some sort of allergen, quite possibly mold.