The vast majority of people are exposed to small amounts of mold or their spores on a daily basis without evident harm. However, mold growing inside a home is an unsanitary condition that may present potential health risks to occupants. Therefore, it is always best to identify and correct high moisture conditions quickly before mold grows and possible health problems develop.

• respiratory problems, such as wheezing, difficulty breathing, and shortness of breath
• sneezing and/or nasal congestion
• eye irritation (itching, burning, watery, or reddened eyes)
• coughing or throat irritation
• skin rashes or irritation
• headaches
• fatigue

The potential health effects depend on the amounts and types of mold present, the length and frequency of exposure, and the sensitivity and health condition of exposed individuals. While many people seldom experience ill effects from mold exposures, some may develop very serious illnesses. Some persons exposed to mold or mold spores may become sensitized and develop allergies to the mold or other health problems. Even "dead" mold (including spores and pieces of mold) may still cause allergy, irritation, or toxigenic reactions. Thus, killing mold without removing the residue may still be a health concern. Complete removal and thorough cleanup of mold is the safest solution.

• individuals with existing respiratory conditions, such as allergies, asthma, or chemical sensitivities
• individuals with weakened immune systems due to conditions such as HIV infection or cancer treatment
• infants and young children
• the elderly

Anyone with a health problem they believe may be due to mold exposure should consult a medical professional.