Parotid swelling refers to the enlargement of the parotid gland, which is the largest salivary gland located in front of and below the ear. This gland produces saliva that helps in digestion and keeps the mouth moist. Swelling of the parotid gland may occur due to infections, blockage of saliva ducts, inflammation, or tumors. In many cases the swelling may cause pain, tenderness, or difficulty while eating. Early diagnosis by an ENT specialist is important to identify the underlying cause and provide proper treatment.