Why white patches

A 25 year old man comes to the OPD stating that he has problem chewing food and cannot open his mouth completely. On examination white patches were seen on the tongue.The picture of the lesion is shown below.What is the most probable diagnosis and the best treatment available for this patient?

Here is rare case.. Dyskeratosis congenita .. brownish reticulate pigmentation on chest , nail dystrophy , skin atrophy of palms and soles , sparse and premature graying of hair, leukoplakia, patient had short stature.. she is more prone to bone marrow suppression and squamous cell carcinoma ..

Patient give history of intake of smokeless tobacco. He has habit of placing the quid of tobacco along with lime in the buccal vestibule at the same location of the lesion.

unscrapable white lesion on lateral part of tongue. History of tobacco chewing . medical history wart over genital part. non irritating, painless lesion. What is line of treatment?

40 year old patient presented with Painless White patches on Dorsal Tongue surface for the past 1 month, according to him, he used antifungals and antibiotics but it didn’t work on him. What is your diagnosis approach?