Hi.. Thanks for the query.. It is clear indication of blocked duct of salivary gland.. The blockage can either be due to any foreign body or food particle blocking the duct opening or stone formation in the duct of the salivary gland known as a Sialolith.. You will appreciate increase swelling when you try​ to eat due to increased saliva flow during eating.. For now you should chew sugar free chewing gum, suck lemon drops and drink plenty of water.. At times the stone flows off with the flow of saliva.. If it doesn t resolve then you should consult an Oral Surgeon and get evaluated and an x Ray can help in ruling bout the location of obstruction and will be removed manually if it is superficial or surgically if it is deep.. Hope this helps. Regards.