If the asthma is not controlled, please see a pulmonologist who can modify the treatment if required. Aerobic exercises and deep breathing excercises will help her improve the lung capacity and help her control the asthma better. Avoid the asthma triggers like dust, cold air, animal fur, agarbatti, dhoop, smoke, etcz

Hi. I understand your concern s. Asthma is a chronic disease which can not be cured but can definitely be controlled so that you can have a symptom free life ahead. She will need to be under regular follow up. She will need to undergo a pulmonary function test which is needed for the diagnosis as well as to assess severity of asthma based on which treatment can be started. Consult a pulmonologist for the same. Diet is generally not related to asthma . But ya she can do breathing exercises and walking.