Diagnosis is a very important aspect of Ayurveda. As per Ayurveda, diagnosis involves identification of root cause of disease.The method of diagnosis by Ayurveda mainly depends on the in- depth -understanding of Dosha and Dushya. Proper diagnosis is the most essential feature of treatment of disease. There are various factors which affect heaith such as diet, environment, life-style etc. Since Ayurveda treats according to the constitution of an individual, it is known as highly accurate and personalised method for analysing disease.According to Ayurveda, all the diseases are caused by aggravation of three Doshas - Vata, Pitta and Kapha. The Nidana or solution of the disease is done in accordance with the Doshas. This article discusses some diagnostic approaches of Ayurveda as a tool for Nidana.