Prune-juice expectoration refers to the act of spitting up thick, brownish-red phlegm that resembles prune juice. This unpleasant condition is often associated with respiratory infections, such as bronchitis or pneumonia. There are several synonyms for prune-juice expectoration, including rusty sputum, bloody sputum, and blood-streaked phlegm. Other terms used to describe this symptom include hemoptysis, which refers to coughing up blood, and expectorating blood. While prune-juice expectoration may be alarming, it is important to seek medical attention if it persists or is accompanied by other symptoms, such as chest pain or difficulty breathing. Treatment options may include antibiotics, bronchodilators, or steroids, depending on the underlying cause.