Dry and sore throat for a month, can be due to adverse factors stimulation or chronic pharyngitis, reflux pharyngitis and so on. 1. Adverse factors stimulation: If you often intake of spicy stimulating food, such as chili, pepper, ginger, etc., it is easy to stimulate the throat area, so that the mucous membrane appears congestion, swelling, and then cause the throat is always dry and painful. If you use your voice excessively for a long time because of work, and your voice does not get enough rest, you will also have a dry and sore throat for a month. 2. Chronic pharyngitis: It is a chronic inflammation of the mucous membrane of the pharynx, submucosa and surrounding lymphatic tissue. It is characterized by long duration, high recurrence rate and stubborn symptoms. Due to the pharyngeal glands to reduce secretion, it will lead to the patient’s throat is always dry and painful phenomenon, usually also in the morning when there is frequent irritating cough. 3. Reflux laryngitis: The reflux of stomach contents can also cause patients to have a long-term dry and sore throat, mainly due to the acidic contents of the stomach reflux stimulation of the throat area. If you have a dry and sore throat for a month, it is recommended that you consult a doctor for a systematic examination, and then follow the doctor’s instructions for standardized treatment.