Pharyngitis can cause nausea. Both acute pharyngitis and chronic pharyngitis can lead to nausea reactions. The nausea reaction caused by pharyngitis is mostly due to the following principles: First, in acute and chronic pharyngitis, the pharyngeal mucosa is congested, the blood vessels are dilated, the lymphoid tissue under the mucosa is hyperplastic, the glands are hypersecretory, and there is a large amount of mucus secretions attached to the posterior pharyngeal wall and pharyngeal cavity, which stimulates the pharyngeal reflex, resulting in a nausea reaction. Second, patients with acute and chronic pharyngitis often have a sense of foreign body obstruction in the pharynx, and in order to relieve clinical symptoms, they always habitually swallow, thus swallowing more air, and the accumulation of gas in the gastroesophagus will in turn cause habitual movements such as nausea, belching, and eructation in patients.