Phlegm in the throat and nausea are caused by the irritation of the throat. When a cold occurs, or an upper respiratory tract infection, the symptoms of laryngitis may appear. In addition, the pharynx secretes a lot of inflammatory exudate, which can also lead to the symptom of phlegm in the throat. Therefore, anti-inflammatory treatment for the throat can effectively relieve the uncomfortable symptoms, for example, you can use Pudilan Anti-inflammatory Oral Liquid or Glycyrrhiza Bingmei Tablets or Blue Scutellaria Oral Liquid for treatment. If yellow sputum occurs or elevated white blood cells appear in the blood test, it means that the throat is congested and edematous due to bacterial infection, and oral antibiotics are needed for treatment. If there is no allergy to penicillin, it is better to take oral amoxicillin to relieve the inflammation of the throat, which is very effective.