The sputum that comes out is gray and may be caused by local inflammation of the respiratory tract. It is suggested that the patient can take oral slow lime to relieve the symptoms, drink more water and avoid spicy and stimulating foods. It may also be caused by chronic pharyngitis, you can choose to nourish yin and produce fluid Chinese medicine, such as smallpox powder, lily of the valley, honeysuckle, watermelon cream, ice chips, etc. to take to relieve symptoms. The treatment of chronic pharyngitis is more difficult, the process is also relatively long, the most important thing is to remove the cause, do not eat spicy, stimulating food, quit smoking, quit drinking, usually can be appropriate exercise to enhance resistance.