If you have mold present in your home, it can cause illness in several ways:
Irritation: Exposure to mold can irritate the eyes, nose, and upper breathing passages. Symptoms include burning eyes, nasal congestion, coughing, and post-nasal drip.
Allergy: Many people become allergic to mold and develop hay fever or asthma symptoms. This includes itchy, watery eyes, nasal congestion, sneezing, chest tightness, cough, and wheezing.
Toxins: Some molds create chemicals called mycotoxins that can cause illness. Much remains unknown about mold toxins. What we do know is that some molds effect the skin, the respiratory system, the immune system, and the nervous system.
Infection: Some molds can also cause infection, such as chronic sinus infections. Other types of mold-induced infection are much less common, and occur mainly among people with weakened immune systems. Examples of individuals with weakened immune systems include: those with HIV infection; those receiving chemotherapy; the elderly; children; and pregnant women.