Black mold (Stachybotrys chartarum) can harm the upper respiratory tract by releasing spores and mycotoxins that irritate and inflame the nasal passages, sinuses, and throat, leading to symptoms like nasal congestion, sore throat, coughing, and sneezing. It can trigger or worsen allergic reactions, asthma, and chronic sinusitis, and in severe cases, cause fungal sinus infections or hypersensitivity pneumonitis, particularly in individuals with weakened immune systems or respiratory conditions. V