If the patient has a dry throat with white foamy sputum, you should first go to the hospital to determine the specific cause of the disease through blood tests or do a lung CT, common causes are pharyngitis, upper airway cough syndrome, upper respiratory tract infections and other causes, can be relieved through the treatment of the disease, commonly used treatments for drug therapy. 1. Pharyngitis: acute pharyngitis patients can follow the doctor’s instructions to use potassium permanganate solution for oropharyngeal rinsing, but also the use of antiviral drugs for treatment, such as buspirone oral solution, antiviral oral solution, chronic pharyngitis patients can follow the doctor’s instructions to use the compound borax solution, the compound chlorhexidine gargle solution for gargling. 2. Upper airway cough syndrome: patients can follow the doctor’s instructions to use inhaled glucocorticoids for treatment, such as mometasone furoate nasal spray, budesonide nasal spray, etc., but also the use of acetylcysteine tablets, aminoglutethimide tablets and other expectorant drugs for treatment. 3. Upper respiratory tract infections: If it is a viral infection, generally do not give special treatment, the influenza virus can be taken orally oseltamivir, if it is a bacterial infection caused by the use of levofloxacin tablets, amoxicillin capsules, and other drugs as prescribed by the doctor to carry out treatment. Specific treatments need to go to the hospital to confirm the diagnosis, under the guidance of the doctor, according to their own situation to choose, the patient must not be unauthorized use of medication, stop or change drugs.