Clear or White Phlegm: Dampness or Cold: Clear or white phlegm is often associated with conditions of dampness or cold in the body. It may indicate an imbalance in the spleen or lungs, characterized by poor fluid metabolism or weakened lung function. Yellow Phlegm: Heat or Infection: Yellow phlegm typically indicates the presence of heat or infection in the body. It may be a sign of acute respiratory infections, such as bronchitis or pneumonia, or chronic conditions with underlying heat patterns. Green Phlegm: Heat and Toxins: Green phlegm suggests the presence of heat and toxins in the body, often associated with severe infections or inflammatory conditions. It may indicate a more advanced stage of illness or the body's efforts to expel pathogens. Brown or Rust-Colored Phlegm: Stagnation or Old Blood: Brown or rust-colored phlegm may indicate the presence of old blood or stagnation in the body. It can be seen in cases of chronic lung conditions, such as chronic bronchitis or pulmonary tuberculosis, where there is long-term inflammation or damage to the lung tissue. Black Phlegm: Severe Heat or Toxins: Black phlegm is a rare but concerning sign that suggests severe heat or toxicity in the body. It may be seen in cases of severe lung infections, occupational exposure to pollutants or toxins, or advanced stages of lung disease which may already affect the Kidneys. Foamy or Frothy Phlegm: Dampness or Phlegm-Dampness: Foamy or frothy phlegm often indicates the presence of dampness or phlegm-dampness in the body. It may be associated with conditions such as asthma, chronic bronchitis, or congestive heart failure, where there is an accumulation of fluid in the lungs.