Why does swallowing saliva cause ear pain?

Ear pain during swallowing is primarily caused by two factors. First, inflammation in the pharynx—such as acute pharyngitis—can cause throat pain when swallowing. This throat pain may radiate or refer to the ear due to shared nerve pathways, resulting in concurrent ear discomfort.

This is the first cause: underlying acute pharyngitis. In such cases, the throat is already painful, and swallowing exacerbates this pain. The pain originating from the pharynx can radiate to the ear, creating the sensation of simultaneous ear pain.

The second cause involves primary ear conditions—such as otitis externa or acute otitis media. During swallowing, facial and neck muscle movements may trigger or intensify ear pain stemming from these pre-existing ear disorders.

In summary, there are two main causes: (1) referred pain from acute pharyngitis, where throat pain radiates to the ear; and (2) primary ear pathology—such as acute otitis media or acute otitis externa—that becomes symptomatic during swallowing.