Toxic mold refers to certain types of mold that produce mycotoxins—chemical compounds that can be harmful to humans when inhaled, ingested, or contacted. Common indoor molds such as Stachybotrys chartarum (black mold) can grow in damp, poorly ventilated areas, including basements, bathrooms, or areas affected by water damage. Exposure to toxic mold can trigger symptoms such as respiratory irritation, coughing, sneezing, itchy eyes, skin rashes, headaches, fatigue, and, in sensitive individuals, exacerbation of asthma or other chronic respiratory conditions. Prolonged exposure may pose greater health risks, particularly to children, the elderly, or those with weakened immune systems. Identifying and removing mold and controlling moisture are important steps in reducing exposure.