If you do not have a cold and have a dry cough, you are mainly considered to have acute tracheitis or bronchitis, because it is a relatively rapid onset, usually with mild systemic symptoms and mainly a dry cough or a small amount of mucus sputum at the beginning. As the disease progresses, there will be more sputum in the later stage, which may be accompanied by blood sputum, and the cough and sputum may last for 2-3 weeks. The important thing for acute bronchitis is to treat it actively, otherwise it will easily merge into chronic bronchitis if it is prolonged. For its treatment, coughing without phlegm can be treated with dextromethorphan oral solution or compound codeine oral solution for strong cough suppression; if you obviously have an itchy throat, you can take oral compound methoxynamine capsules and ketotifen tablets for cough suppression, in addition to more rest, drink water several times in small amounts and avoid straining.