Leucoplakia is a medical condition characterized by white or gray patches in the mouth. Some synonyms for the term include oral leukoplakia, erythroplakia or leukokeratosis. Leukoplakia may be a benign condition and can be caused by a variety of factors including smoking, alcohol consumption, and chronic irritation of the oral tissues. However, it could also be a pre-cancerous condition and therefore requires careful monitoring. Treatment options may include eliminating the underlying cause, medication or surgical intervention. It is important to consult a healthcare professional if you suspect the presence of leucoplakia or any abnormality in the oral cavity.