Hello. Thank you for asking at HCM. I went through your son s history. Childhood asthma is a dynamic disease which has a tendency to improve and worsen over long time periods depending upon child s environmental changes, diet, medications, etc. If for last three months his frequency has increased, if his symptoms limits his daily activities/exercise or he has night-time cough more than once a week or he has to use his rescue inhaler (such as salbutamol or levosalbutamol) for more than twice a week, I would suggest him to start daily controller medications (or increase his controller medications if he is already taking them) for at least next 3 months. I will also suggest you to consult an Allergist-Immunologist who will test him for allergies and may suggest additional measures and allergen immunotherapy to improve asthma control. I want to emphasize on correct technique of using inhalers as this is crucial to ensure that adequate amount of drug is getting into his lungs. I would also suggest him regular breathing exercises, a healthy diet rich in vitamins and minerals and avoidance of dusts-smokes-air pollution as much as possible. Hope this will be helpful to you. Wish your son the best of the health. Regards.