The possible causes of white growths in the mouth are oral leukoplakia, oral white keratosis, and lichen planus of the oral mucosa, which are the most common diseases with white markings, and most of the causes are irritation, including the irritating nature of smoking or betel nut chewing, which leads to keratinization of the mucosa in the mouth. For the treatment of this disease, it is usually necessary to get rid of the irritants and the application of hormones can be considered for treatment. White growths in the mouth can also be a Candida infection, which can also manifest as having white patches. Therefore, if white growths in the mouth do not feel normal, you should visit a hospital as soon as possible to determine what the cause is through clinical examination.