White granules in the oral cavity generally have the following two conditions: the first is a physiological lesion, such as miosis, which is actually an ectopic growth of sebaceous glands, a normal physiological structure that does not require surgery or medication. Many patients feel panic once they find small white granules in the oral cavity, thinking they are suffering from some terminal disease, but in fact, most cases are ectopic sebaceous glands, which generally occur In the inner side of the upper and lower lip and both sides of the buccal mucosa, scattered white or yellow particles, some soft to the touch, some slightly rough to the touch, which are normal sebaceous gland structure. The second is pathological condition, pathological white particles may have many possibilities, such as oral leukoplakia, oral candida infection, oral discoid lupus erythematosus and tuberculosis, collectively known as oral white lesions, white lesions in the oral cavity are mostly benign, but a small number of them have the possibility of cancer, so some diseases are also known as precancerous lesions, such as leukoplakia, so once found, we should seek timely medical treatment.