Leukotriene is mainly a sensitizing cause of rhinitis, and its main function is to increase the permeability of capillaries and microvessels, subsequently causing local edema, so it belongs to the more common inflammatory mediators. Especially in the upper and lower respiratory tract inflammation plays a very important role in the induction of nasal allergic reaction in the role of much stronger than histamine, so need to pay attention and attention. Especially some discomfort, it is necessary to assess and actively correspond to the treatment, so as not to induce and aggravate the condition is more troublesome, so as soon as possible to clarify the cause of the symptomatic treatment.