What causes tongue to look blue?
Providing that the tongue is not stained from eating, tongues that are blue or pale might indicate lung or heart disease or anemia.
Did you eat anything blue? or drink? Like a lollipop or slush, lemonade or something?
no flow of blood , cut off circulation.
Eating/Drinking something Blue
The color of the tongue turning blue is because no oxygen or not enough or presure on the neck
1. Popsicle2. Disease