These glands are located in the upper portion of your cheeks in front of the ears. The function of the parotid gland empties saliva into your mouth, which helps in biting, swallowing, and digesting food.
Salivary gland infection happens when a bacterial or viral disease influences your salivary gland or pipe. The infection can result from diminished saliva flow, which can be because of a blockage or irritation of your salivary duct; the condition is called sialadenitis
Parotid duct blockage can happen because of various reasons-