Coughs are classified according to their duration as acute coughs if they last less than 3 weeks, subacute coughs if they last 3-8 weeks, and chronic coughs where the condition usually lasts longer than 8 weeks. Depending on the cause, some coughs are self-limiting and some require medication. The most common cause of acute cough is the common cold, others are acute bronchitis, allergic rhinitis, and bronchial asthma. Such cases can be treated with oral prescription cold medications or anti-allergy medications to reduce airway hyperreactivity, which can disappear as the disease heals. The most common causes of subacute cough are post-infectious cough and bacterial sinusitis. In the former case, if the cough is severe, short-term coughing with cough suppressants such as dextromethorphan and first-generation antihistamines such as ketotifen, the disease is self-limiting and usually resolves after 3-8 weeks. Chronic cough with multiple causes, such as irritating cough at night, may be cough variant asthma, which requires long-term inhalation of glucocorticoids and/or bronchodilators to relieve symptoms and control the condition. This asthma requires long-term inhalation of glucocorticoids and/or bronchodilators to relieve symptoms and control the condition. Cough with acid reflux and belching is considered to be caused by gastroesophageal reflux disease and can be treated with oral acid suppressants, such as omeprazole and gastroprokinetic drugs. People with cough with runny nose, nasal congestion, nasal itching, and frequent throat clearing may try first-generation antihistamines or decongestants. If a patient with hypertension is taking ACEI antihypertensive drugs such as captopril orally, it is possible that the drug is causing the cough and needs to be discontinued. In conclusion, there are many causes of coughing and the duration of coughing varies. If the cough persists and conventional medication is generally ineffective, a hospital visit is needed to clarify the cause and treat the symptoms.