Crack lung is a pulmonary condition that can occur in those who use large amounts of the narcotic crack cocaine.

The illness typically causes fever, coughing, phlegm, intense pain, and bleeding from the lungs.

Crack lung sometimes shows up as lung abnormalities on X-rays, though this is not always the case. It can cause severe inflammation and scarring of the lung tissue. The condition can lead to chronic lung damage and death.

Lung tissue specimens from this patient revealed diffuse alveolar damage, alveolar hemorrhage, and interstitial and intraalveolar inflammatory cell infiltration notable for the prominence of eosinophils.