Complications

Most allergic responses to mold involve hay fever-type symptoms that can make you miserable but aren't serious. However, certain allergic conditions caused by mold are more severe. These include:

• Mold-induced asthma. In people allergic to mold, breathing in spores can trigger an asthma flare-up. If you have a mold allergy and asthma, be sure that you have an emergency plan in case of a severe asthma attack.
• Allergic fungal sinusitis. This results from an inflammatory reaction to fungus in the sinuses.
• Allergic bronchopulmonary aspergillosis. This reaction to fungus in the lungs can occur in people with asthma or cystic fibrosis.
• Hypersensitivity pneumonitis. This rare condition occurs when exposure to airborne particles such as mold spores causes lung inflammation. It can be triggered by exposure to allergy-causing dust at work.

Other problems caused by mold

Besides allergens, mold can pose other health risks to susceptible people. For example, mold can cause infections of the skin or mucous membranes. Generally, however, mold doesn't cause systemic infections except for people with impaired immune systems, such as those who have HIV/AIDS or who are taking immunosuppressant medication.