If you have a simple cough without fever, it is considered to be caused by bronchitis or pneumonia. Allergic asthma, cough variant asthma, and other causes may also cause a simple recurrent cough without fever. In this case, routine blood tests and chest radiographs are recommended to clarify the cause. If the bronchodilator test is positive, it may be associated with bronchial hyperreactivity caused by allergic factors. In this case, appropriate anti-allergic medications such as ketotifen or paracetamol should be used for treatment. Montelukast sodium can also be used for oral medication. During the treatment, it is important to avoid exposure to cold air or irritating gases to avoid recurrence or aggravation of the condition.