An itchy throat with foamy white sputum may be a symptom of certain diseases, such as allergic laryngitis, reflux laryngitis, chronic bronchitis, etc., and you should consult a doctor in time to find out the cause. 1. Allergic pharyngolaryngitis: pharyngolaryngolaryngitis caused by allergies can be characterized by an itchy throat, coughing, and coughing up white foamy sputum. 2. Reflux laryngitis: the abnormal reflux of gastric contents into the throat and the discomfort caused by the symptoms or local mucosal damage, which leads to a series of extra-esophageal symptoms, such as itchy throat, hoarseness, sore throat, pharyngeal foreign body sensation, as well as chronic coughing, etc., and white sputum may also appear. 3. Chronic bronchitis: long-term, repeated, gradually aggravated is the main feature of the cough, usually white mucus or syrupy foamy sputum, more sputum in the early morning; generally heavier cough in the morning, lighter during the day, a bout of coughing or phlegm before going to bed, mucus phlegm coughing out the chest that is the feeling of relief, coughing to reduce. Itchy throat with white sputum foamy, suggest that patients hospital visits, by the doctor after a clear diagnosis, give targeted treatment.