Hi there ~
I understand your concerns. A swollen vein in the left side of your tongue after eating salty food with white bubbles in the tongue does not sound right. The cause may be various and an allergic reaction
to something that you ate might be the most probable cause. I hope this helps relieve your anxiety
however you need to see a physician to know what the real reason is.
I hope this helps. Take care and have a lovely day!