White Tongue. A white coating occurs when the tiny bumps on the tongue, known as papillae, become inflamed. Inflammation usually happens because of dehydration, fever, mouth breathing or smoking. Food debris, bacteria and dead cells then get lodged between the swollen papillae and create the white coating.
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1 Sign in to your Walmart Credit Card Account. 2  Go to the Account Summary page. 3  Click on the link to Dispute a Charge. 4  You can also contact Walmart Credit Services toll-free at 1-877-294-7880.  Representatives are available to assist you 24 hours a day, seven days a week.