Siddha Diagnostic Methodology: Exploring the Eight Vital Tests and the Ancient Art of Balancing Humors
- J Ruby
- Jan 13
- 3 min read

The Siddha system of medicine, a traditional healing practice with roots in ancient Tamil culture, employs a unique diagnostic methodology that combines clinical examination with specialized diagnostic tools. These tools not only help in identifying diseases but also assess the prognosis for restoring health. The diagnostic process is deeply rooted in understanding the body's balance of the three humors (Tamil: Mukkuttram) and the eight vital tests (Tamil: Ennvagai Thervu), which form the foundation of Siddha medicine.
The Three Humors (Mukkuttram)
Siddha physicians base their diagnosis on the balance of the three fundamental energies or humors:
Vatha – Represents air and movement.
Pitha – Represents fire and metabolism.
Kabha – Represents water and stability.
Imbalances in these humors are believed to cause diseases, and restoring their equilibrium is central to Siddha treatment.
The Eight Vital Diagnostic Tests (Ennvagai Thervu)
The eight diagnostic tools used by Siddha physicians are:
Pulse Reading (Naadi): A primary diagnostic tool used to identify imbalances in Vatha, Pitha, and Kapha energies.
Urine Examination (Neer Kuri and Neikkuri): Focuses on color, smell, density, froth, and the spreading pattern of gingelly oil (Nallennai) on the urine surface. This provides key insights into disease diagnosis.
Examination of Faeces (Malam): Analyzes stool for clues about digestive health and systemic imbalances.
Examination of Eyes (Kangal): Assesses eye health and detects symptoms indicative of underlying conditions.
Study of Voice (Mozhi - Kural): Observes changes in speech and voice tone as indicators of disease.
Color of the Body (Niram): Examines skin color to identify abnormalities or humoral imbalances.
Examination of the Tongue (Naa): Looks at tongue color, texture, and coating to detect internal disorders.
Status of Sensation (Sparism): Checks for changes in tactile sensation and temperature regulation.
Key Diagnostic Methods
Urine Examination (Neerkuri and Neikkuri)
Urine analysis is a cornerstone of Siddha diagnostics. Physicians observe parameters such as:
Color: Indicates hydration and systemic health.
Smell and Froth: Suggest metabolic imbalances.
Density and Quantity: Reflect kidney and urinary tract health.
Oil Pattern (Neikkuri): When gingelly oil is added to urine, its spreading pattern reveals valuable information about disease type and severity.
Pulse Reading (Naadi)
Pulse reading is another prominent diagnostic technique in Siddha medicine, comparable to modern diagnostic tools like stethoscopes. Physicians examine the pulse on the left hand for women and the right hand for men to determine the state of the three humors.
A Blend of Tradition and Science
The Siddha diagnostic methodology reflects a deep understanding of the body’s physiological processes. Techniques like pulse reading and Neikkuri offer insights that align with modern concepts of systemic health. These traditional tools continue to serve as a testament to the wisdom of Siddha medicine, offering a holistic and personalized approach to diagnosis and treatment.
By integrating these time-tested methods into healthcare, Siddha medicine bridges the gap between ancient traditions and modern innovations, ensuring that patients receive comprehensive and effective care.
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