4-Yellow tongue
Sometimes, a yellow tongue is not indicative of anything; according to The Mayo Clinic, it could simply be due to a build-up of dead cells on the papillae that gives it a yellow appearance.
However, if you do have a yellow tongue, you shouldn’t assume that the issue is as harmless as that, and you should pay attention to other possible symptoms like fatigue, excessive gas, and frequent nausea or queasiness, as a yellow tongue can be an indication of jaundice, which means your liver or gallbladder is not functioning properly. You may also have other serious digestive problems, and this needs to be examined by a doctor—especially if the yellow color sticks around, and you start having other symptoms of liver or digestive illness.
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