There are no symptoms associated with the lesion itself,  although many and varied symptoms and signs may be associated with the underlying cause of immunosuppression. The lesion is a white patch, which almost exclusively occurs on the lateral surfaces of the tongue, although rarely it may occur on the buccal mucosa , soft palate , pharynx or esophagus .  The lesion may grow to involve the dorsal surface of the tongue. The texture is vertically corrugated ("hairy") or thickly furrowed and shaggy in appearance. 
Leukoplakia is a condition in which thick, white patches form on your tongue and the lining of your mouth. Smoking is the most common cause. But other irritants can result in this condition as well.