Chronic persistence of allergic asthma is characterized by the absence of acute asthma attacks, but they continue to occur with varying frequency over a considerable period of time. The level of asthma control is by far the most clinically used assessment and consists of two parts: clinical control assessment and future risk assessment. The clinical control assessment looks at whether the patient has had daytime asthma symptoms more than twice a week, suffocated waking at night due to asthma, use of reliever medication more than twice a week, and asthma-induced activity limitation in the past four weeks. The absence of any of these symptoms indicates good control; the presence of 1 or 2 of these conditions indicates partial control; and the presence of 3 or 4 of these conditions indicates uncontrolled disease. Factors associated with increased risk in future risk assessment were poor clinical control, frequent asthma attacks in the past year, and tobacco exposure. The treatment of chronic persistent allergic asthma is based on the severity of the patient’s condition.