Parotitis is the inflammation of the parotid salivary gland, characterized by swelling, redness, and soreness, primarily caused by bacterial and viral infections, with mumps being the most common viral cause in children. Risk factors include dehydration, malnutrition, and medications that suppress salivary flow, while symptoms may consist of facial pain, fever, and swelling of the glands. Management involves hydration, antibiotics for bacterial cases, and possibly surgical interventions, with MMR vaccination recommended for prevention.