Blood streaked
Inflammation of throat
Lung cancer
Ulcers
Copious amounts of blood
TB Lung Abscess Bronchiectasis Lung infarction Pulmonary embolism
Green
Infection ?
Rust
Pneumococcal bacteria
TB
Brownish
Chronic bronchitis
Chronic pneumonia
Yellowish purulent
Pus
Yellow-ish green
Bronchiectasis
CF
Pneumonia
White, milky or opaque
Viral infection
Allergy
Foamy white
Pulmonary oedema (early phase)
Frothy pink
Severe pulmonary oedema
Black / black specks
Smoke inhalation