Upper respiratory tract infection is an acute inflammation of the upper respiratory tract, and the common types and manifestations are as follows: 1. Common cold: It is the most common type, mainly caused by viruses, and the main manifestations of patients are sneezing, nasal congestion, runny nose, which may be accompanied by pharyngeal soreness, pharyngeal itching, cough, and burning sensation in the nasopharynx. If the condition is severe, hoarseness, pain in the throat, or even cause obstruction of the pharyngeal tube, resulting in hearing loss; 2. Viral pharyngitis: mainly throat performance, such as cough, sore throat, no obvious symptoms of runny nose; 3. Pharyngeal conjunctivitis: common in children, in addition to respiratory symptoms, can also appear conjunctival redness, congestion, photophobia, tearing; 4. Acute infectious tonsillitis: can appear tonsillar redness The tonsils may be red, swollen, and purulent.