Diagnosis in medicine refers to the process of identifying a disease or pathology from symptoms and from a study of the origin and course of the patient’s condition. In Western medicine, diagnosis is both an art and a science and ranges from simple visual observation to sophisticated technology. Standard diagnostic techniques include taking a case history, observing the patienťs physical symptoms and mental and emotional state, touching, feeling, palpating, and running tests designed to measure physiological conditions ranging from temperature, blood pressure, and pulse rate to blood chemistry, hormone levels, and cellular metabolism. These techniques provide information leading to the identification of the disease or abnormality on which basis treatment is made.