What happens if you breathe in mold

Breathing in mold can cause irritation, allergy symptoms, and asthma flare-ups, and people with weakened immune systems or chronic lung disease can be at higher risk for more serious problems.

Quick Scoop

Common symptoms after inhaling mold include:

• Stuffy or runny nose.
• Sneezing.
• Coughing or wheezing.
• Sore throat.
• Itchy, red eyes.
• Skin rash.

Some people may also have shortness of breath, fever, or a stronger allergic reaction, and severe exposure can be more dangerous for people with asthma, mold allergy, or weakened immunity.

When it gets serious

Mold exposure can sometimes lead to lung infections or inflammatory lung problems in vulnerable people, including hypersensitivity pneumonitis and certain fungal infections.

If you have chest tightness, trouble breathing, coughing up blood, or symptoms that are getting worse, you should get medical help promptly.

What to do now

• Leave the moldy area if you can.
• Get fresh air and avoid further exposure.
• If symptoms are mild, monitor them closely.
• Seek urgent care if you have wheezing, shortness of breath, fever, or a severe allergic reaction.

How to lower risk

Fix leaks, dry damp areas quickly, and remove visible mold safely so it does not keep growing indoors.

If you want, I can also give you a simple “mold exposure: what to do today” checklist.