Sialadenitis is a medical term used to define the inflammation of the salivary glands. There are several synonyms that are used interchangeably with this term. These include salivary gland infection, salivitis, parotitis, and submandibular gland inflammation. The symptoms of sialadenitis include pain and swelling of the affected gland, fever, difficulty opening the mouth, and dry mouth. Common causes of sialadenitis include bacterial or viral infections, dehydration, and salivary stones. Treatment can range from antibiotics and pain relievers to surgery in severe cases. If left untreated, sialadenitis can lead to serious complications such as abscesses, sepsis, and permanent damage to the salivary glands.