The phenomenon of dry cough without phlegm but itchy throat is caused by laryngitis, which is often caused by viral or bacterial infections, with congestion and edema in the throat and strong irritation, resulting in itchy throat and dry cough. If the symptoms are serious, you can also take oral anti-inflammatory drugs, such as pandanus anti-inflammatory oral liquid, citrus ice plum tablets. 3, for dry cough, you can use cough medicine, such as fenugreek sugar cough syrup, 4, adults can also use compound licorice combination for cough treatment.