Rust-colored sputum is usually caused by lobar pneumonia due to Streptococcus pneumoniae infection involving lung tissue.
Rust-colored sputum is commonly seen in lobar pneumonia, which is mostly caused by Streptococcus pneumoniae infection involving lung tissue above the lung segments, diffuse fibrin exudation in the alveoli, capillary dilatation in the alveoli, exudation of erythrocytes, and the destruction of erythrocytes releasing ferrohemoglobin, which mixes in the sputum and is manifested as coughing up rust-colored sputum.
In addition to Streptococcus pneumoniae, it can also be L. pneumophila and other bacteria, mostly occurring in the rain, late at night, drunk, cold, acute high fever, and later cough rust-colored sputum, the patient needs to strengthen the nutrition, symptomatic treatment, high fever with antipyretic drugs such as ibuprofen, but also antibiotic treatment, such as cefuroxime and so on.
Cough rust-colored sputum need to consult a doctor in time, active treatment, avoid self-medication blindly.