Why Is Black Mold Dangerous?

Black mold, often Stachybotrys chartarum, grows on damp materials like drywall and wood. It releases tiny spores and compounds that you can breathe in. For many people, this causes coughing, sneezing, watery eyes, or headaches. Those with asthma or allergies may notice stronger reactions, such as wheezing or shortness of breath.

Long-term exposure to significant mold growth may lead to more serious issues, including lung inflammation or infections in people with weakened immune systems. The danger depends on how much mold is present, how long you are exposed, and your own sensitivity. If you feel unwell, see a doctor for guidance.

• Coughing and throat irritation
• Sneezing and nasal congestion
• Worsened asthma symptoms
• Headaches and fatigue
• Skin or eye irritation

Black mold often appears as dark green or black patches with a slimy texture on damp surfaces. It may have a musty odor and can spread across drywall, wood, or carpet. You might see it near water stains, around windows, or behind appliances where moisture collects.

Not every dark spot is black mold, but any mold growth should be taken seriously. If you suspect mold, avoid touching or disturbing it, as that can release spores into the air. A professional inspection can help confirm the type and extent of the problem.

You should consider calling a mold professional if the mold covers more than a few square feet, if you have health concerns, or if the mold keeps coming back. A professional can assess the situation and recommend the right course of action. They may use moisture mapping to identify hidden dampness.

For water damage that leads to mold, a full cleanup may be needed, including removing affected drywall or flooring. The pros can handle structural drying and dehumidification to help prevent mold growth. Your insurance policy may cover some of these costs, but check your policy to know what is covered. Policies vary, and your insurer decides what is covered.