Throat itching and bubbles need to consider the throat and other mucous membranes have obvious congestion, edema, inflammatory secretion exudation, mainly common in allergic factors caused by cough variant asthma, as well as allergic rhinitis complicating postnasal drip syndrome. Because of the stimulation of allergens, allergens commonly include oil smoke, pollen, dust mites, cold air, as well as eating a high-protein diet, may cause the airway to appear obvious hyperreactivity, airway mucosa congestion, edema and its walls of the capillary vascular permeability will be increased and there is a large amount of secretion exudation. Both the nasal mucosa and the mucosa of the pharynx will show these pathological manifestations, and then the inflammatory secretions will accumulate in the pharynx and drip in the wall of the pharynx, and the symptom of spitting bubbles will appear.