When some people brush their teeth, they can go a bit overboard and scrub their tongue a bit too vigorously. Some researchers believe that this can be an ancillary cause of burning tongue syndrome, so they recommend a change in toothpaste. Rather than scrubbing your teeth with commercial toothpaste, which can often have other irritants or chemicals that interact poorly with your endocrine system, brush your teeth with baking soda for a week or so and see if the condition improves. There are many different causes of burning tongue, but baking soda can be an effective solution for all of them.