Unveiling the Diagnostic Potential of Nafth (Sputum): A Synthesis of Unani and Contemporary Knowledge

Nafth (Sputum), a mixture of mucus, cellular debris, and saliva, is expelled during coughing, providing important insights into respiratory health. Nafth is an Arabic word used in the Unani system of medicine, which refers to sputum. Sputum's properties, like; quantity, colour, consistency, smell, and ease of expulsion, provide important diagnostic hints. Green sputum denotes coldness, while Al-Nafth al-Aṣfar (yellow sputum) suggests extra bile and Hararat (heat). At the same time, Al-Nafth al-Muntin (foul-smelling phlegm) indicates ‘Ufūnat (infection). Al-Nafth al-Ghalīẓ(thick sputum) may indicate accumulation. Unani scholars correlate sputum characteristics with conditions like pneumonia, pleurisy, tuberculosis, and chest abscesses. Classical texts, including Hippocratic writings, detail the implications of spherical clots and foul odour as signs of advanced disease. Recovery is observed when all the characteristics of sputum come to an optimum level. By knowing the normal and abnormal sputum properties, anyone can understand the cause, progress and diagnosis of diseases. This study will guide the researcher in further research related to respiratory diseases.