Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Geographic tongue ?
    ### Response:
    Geographic tongue is a condition that causes chronic and recurrent lesions on the tongue that resemble psoriasis of the skin. It is characterized by pink to red, slightly depressed lesions with irregular, elevated, white or yellow borders. The lesions may also occur in the mucosa of the mouth and labia; this condition is called "areata migrans" because they  typically disappear from one area and move to another.
    