The most common clinical condition is chronic inflammation of the upper respiratory tract, mainly referred to as chronic pharyngitis. In the clinic, this condition mainly occurs after fatigue, alcoholism, cold and other factors that reduce immunity, the body will be infected by external pathogens, including viruses, bacteria and other acute laryngitis, but did not go to the regular treatment in a timely manner, or did not go to treatment at all, the inflammation is prolonged and formed chronic laryngitis. The airway will be significantly congested, edema, inflammatory secretions exuded, the lumen of the airway will be narrower than normal, and the throat will feel like a foreign body, feel edema, thickening symptoms.