They all secrete saliva -- the parotid through tubes called salivary ducts near the upper teeth, the submandibular under the tongue, and the sublingual through ducts on the floor of the mouth.

The main salivary glands (parotid glands) are located over your main chewing muscle (masseter muscle), beneath your tongue (sublingual gland), and on the floor of your mouth (sub mandibular gland).

Salivary gland obstruction results in pain and swelling in the cheek or under the jawline while eating, and foul-tasting drainage into the mouth. Such obstruction can also progress to severe infection ...