About two weeks ago i noticed my tongue was really itchy. then in the past couple of days it started to hurt. tonight i noticed deep cracks in it and ?

Fissured tongue +?: The fissuring of the tongue can be a normal variation and by itself nothing to worry about. However, it is more prone to bacterial and fungal infections along with a host of other medical conditions that should be ruled out. The best thing to do is to see your dentist for clinical evaluation to determine the exact cause of your symptoms and what if anything need to be done.

Vitamins: You may have a vitamin defiency. Begin taking a multivitamin and if it persists visit your doctor.

Also other things: Can cause those sensation like tooth paste, certain systemic diseases, oral fungus, or an oral condition called burning mouth. See a physician or dental specialist in orofacial pain or oral medicine if the physician can find no cause.