Intervention alone is sufficient for treatment of those with intermittent asthma. However, patients with chronic disease need maintenance medication in addition, to prevent their daily symptoms. Patients with seasonal allergic disease may require maintenance medication, but only seasonally, and patients with chronic disease may require seasonal increases in their maintenance medication during seasonal allergic exacerbations. Adding or increasing maintenance medication at the times when increased symptoms are anticipated avoids morbidity and decreases the likelihood that urgent care will be needed.