From sore throat to itchy throat is not necessarily in the gradual improvement, sore throat is mostly caused by bacterial infection or viral infection, mostly caused by acute tonsillitis or acute pharyngitis, and itchy throat can be caused by allergies, or inflammation caused by pharyngeal swelling and irritation, and the disease is not causally related to the improvement of the disease, that is to say, it is not necessarily in the process of improvement. Only by examining the pharynx can we determine whether the disease is in the process of improvement, such as the pharyngeal mucosal congestion and swelling is reduced, and the tonsil surface secretion is reduced, which suggests that the disease is in the process of improvement. Symptoms of the disease only suggest the regression of the disease, such as the reduction of a single symptom may be more relevant, such as from the pharyngeal pain to the pharyngeal pain reduction or disappearance, suggesting that the pharyngeal disease improvement or even disappearance of the disease, so only after checking the pharyngeal situation to determine whether the disease is improving.