Desensitization treatment of allergic asthma may improve, but due to the different and more allergens, so individual differences, whether a complete cure also depends on the patient’s constitution itself. Allergic asthma is a kind of allergic disease, the main cause is the patient’s physical factors and low resistance. Allergy treatment first needs to identify the allergens, and then a small number of times in contact with the allergic substances, so that the body’s sensitivity to the allergic substances to reduce, which is more commonly used methods are through the injection of allergens or take allergens containing. Desensitization is a relatively long process and is not frequently used in clinical practice because of its limited efficacy. The most important thing for allergic asthma is to stay away from allergens. When the patient actively cooperate with the doctor’s treatment and can block the contact with allergens can achieve a better therapeutic effect, and even have the possibility of recovery. However, if the patient’s asthma symptoms are more serious and it is difficult to avoid allergens and other sensitive substances, then it is easy to relapse, and it is more difficult to achieve the effect of cure.