Salivary glands become infected and swollen most commonly as a result of mumps. However, such an infection may also be caused by bacteria, especially if you are feeling run-down or one of your glands has been damaged by salivary duct stones. When infected, the salivary gland becomes swollen and painful, and the lymph glands in your neck beneath the angle of your jaw may also feel enlarged and tender. If an infection is not treated, prolonged damage to the gland may result in loss of function. If you notice any swelling in your mouth, under your chin, or around your jaw, you should consult your physician or dentist.

Treatment.

Your dentist or physician will probably treat an infection of the salivary glands with an antibiotic if the problem seems to be caused by bacteria. If the infection is persistent, you may be sent to a radiologist for a sialogram (a test to show whether the gland has been damaged.) If it has been damaged, you will probably be advised to have it removed. The remaining salivary glands generally compensate for the loss.