Sore throat, cough and phlegm are typical symptoms of chronic pharyngitis and laryngitis or acute pharyngitis and laryngitis. Acute pharyngitis and chronic pharyngitis are mainly manifested as inflammation of the pharynx; in the case of laryngitis, it is mainly caused by inflammation of the vocal cords, ventricular zone, and vocal fold area of the larynx, which is mainly related to diet, exposure to external stimuli, and infection. The specific causes are as follows: 1, diet does not pay attention to light, often eat some spicy, irritating food, can cause acute and chronic laryngitis, resulting in pain, phlegm symptoms; 2, exposure to irritating odors, dust, fumes, can also cause acute and chronic laryngitis, causing symptoms of phlegm, cough; 3, inflammation: such as viral, bacterial infection, causing acute and chronic laryngitis, resulting in cough, phlegm symptoms;. 4, allergy: if contact with allergens, such as house dust mites, dust mites, fungi, animal fur, or seasonal allergens, such as pollen, grass, willow, can cause allergic pharyngitis, resulting in symptoms of phlegm, sore throat and sore throat. Once the symptoms of sore throat, cough and phlegm appear, they need to be treated with medication in time; diet should be controlled, avoid contact with irritating odors and take some medications for pharyngitis; also avoiding contact with allergens can relieve symptoms and achieve a cured or comfortable state.