Hi thanks for contacting HCM... Here first you should be examined properly for your condition... Here your throat examination , direct laryngoscopy examination , auscultation done first.... It might be allergic swelling like that of asthma ... Chest x ray and pulmonary function test useful for detecting it and other respi causes like chronic obstructive pulmonary disease or bronchitis.... If any developing growth present in larynx or trachea then it will be detected by above examination and investigation procedure... Take care..... Avoid stress. According to cause treatment guided. Dr.Parth