Acute pharyngitis can be contagious. Generally, it can spread through the respiratory or digestive systems. If the patient shows symptoms of fever and throat pain, isolation is required. Typically, isolation lasts for 3-5 days. Acute pharyngitis is caused by a viral or bacterial infection, leading to symptoms in the throat as well as systemic symptoms. The patient may experience sudden high fever, with body temperature above 38°C, and severe throat pain. Other symptoms include dry throat, sore throat, itchy throat, sensation of a foreign body in the throat, and a feeling of obstruction. During an examination with an electronic laryngoscope, the mucous membranes in the throat may be found to be congested and significantly swollen, with pus-like secretions present on the posterior pharyngeal wall. For treatment, an examination using an electronic laryngoscope and a routine blood test are first required. If there is an increase in white blood cells, symptomatic anti-inflammatory treatment and oral antibiotics are needed. If lymphocytes are elevated, symptomatic antiviral treatment is required, and recovery can generally occur within about a week. (The use of medications should be under the guidance of a professional doctor.)