There is a whistling sound in the trachea mainly because the trachea is stimulated by inflammation and produces phlegm, but the phlegm is too much or thick to be discharged, making a whistling sound. In this case, you can first control the inflammation, such as amoxicillin and azithromycin. Allergic asthma can be treated with anti-allergic drugs such as cetirizine and loratadine. You can choose nebulized inhalation to dilute sputum and promote the discharge of sputum. Usual life also need to pay attention to diet, stimulating food do not eat, eat more vegetables, fruits, to light, easy to digest diet. Drink more water, pay attention to keep warm, enhance the exercise, improve immunity, children should strengthen the nutrition, strengthen the body.