cause of bilateral parotid swelling
If not treated, salivary gland infections can cause severe pain, high fevers, and abscess (pus collection). Infections. Viral infections such as mumps, flu, and others can cause swelling of the salivary glands. Swelling happens in parotid glands on both sides of the face, giving the appearance of chipmunk cheeks.. Salivary gland swelling is commonly associated with mumps, happening in about 30% to 40% of mumps infections.