Hello,

You may be experiening what is know as geographic or fissure tongue which results in the soreness and cracking. It is characterized by numerous shallow or deep grooves or furrows (fissures) on the surface of the tongue. The surface furrows may differ in size and depth, radiate outward, and cause the tongue to have a wrinkled appearance and cause nurning and discomfort.

In some cases, fissured tongue may develop in association with infection or vitamin deficiency. This is a benign condition that does not require any specific treatment. You should rinse your mouth with warm salt water to remove any debris that may cause irritation or infection when lodged between the grooves. This usally resolves on it's own. You may want to avoid spicy and citrus foods, include a multivitamin in your diet. If this does not resolve in a few days check with your doctor.

Here is some info, let me know what questions you may have.

http://www.mayoclinic.com/health/geographic-tongue/DS00819

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