Parotitis or mumps, is a contagious disease caused by viruses and located in one or both parotid glands.
It can cause inflammation of the salivary glands, pain when chewing or swallowing, fever, headache, and muscle aches.
A salivary duct obstruction, such as a salivary stone, can lead to a bacterial infection of a salivary gland, with symptoms such as swelling, pain, erythema, and tenderness.
If the cause is a stone, it must be removed to restore normal flow of saliva. One of the techniques can be through endoscopy. If the stone is too large, surgical removal may be necessary, directly accessing the salivary duct to remove the stone.
An obstruction or extravasation of the minor salivary glands can produce a benign lesion called a mucocele, which usually disappears spontaneously.
If this mucocele affects the sublingual glands, a mass of greater volume appears under the tongue, and is called a ranula.