ccording to Siddha or Siddham, this disease is characterized by tightness of chest, difficulty in breathing in which the breathing sounds resemble to the sounds of musical instruments like yaazh or veena. Hence, this sound may be compared to wheeze as per modern science. The causative factors of this disease according to siddham include dietery factors (intake of cold food items ) or any activites which may cause derangement of iya humour or kapham. Iya humour or kapham is the basic reason to cause it. Also associaton of kapham with vatham may be a lead to the severity of this disease. It is also seen that people having this disease are usually allergic to any particular substance for e.g house mites, dust, pollen grain, smoke so exposure to any of these substance may lead to hyper responsiveness of the airway leading to its constriction and producing symptoms like chest tightness, dyspnoea and wheeze .