Fungal lung infections occur when fungi enter the lungs, causing symptoms similar to pneumonia or tuberculosis. These infections can affect healthy individuals but are more common in those with compromised immune systems. Dr. Mayank advises antifungal treatment for conditions like histoplasmosis or aspergillosis. Diagnosis is made through sputum cultures, blood tests, and imaging studies. Early treatment can prevent severe lung damage, and preventive measures include avoiding exposure to environmental fungi in certain areas.