J.M.G.S.L Jayasinghe, R.D.H Kulatunga, D.U.S. Ratnapala, Medo Roga, and its Causative Factors National Research  Conference and Exhibition on Indigenous  Medicine (NRCEIM -2017 ), 27-29 January, Unit of Siddha Medicine, University  of Jaffna, Kaithady,   Sri Lanka,2017