There are many clinical causes of throat itching and coughing, as follows: 1. The more common causes are allergic pharyngitis and chronic pharyngitis; 2. caused by improper diet, such as eating spicy and irritating food, or eating food that is easily allergic; 3. caused by long-term excessive use of the voice; 4. caused by frequent exposure to dust, pollen and other irritants. After the onset of the disease, it is recommended to go to the ENT department for routine blood tests, laryngoscopy, and in vitro allergen testing for some patients, so that targeted treatment can be carried out after the condition is clear.