White flakes inside the lips may be caused by snow mouth disease, oral lichen planus, oral white spots and other causes, the specific causes still need to go to the hospital to determine the examination. 1. snow mouth disease: snow mouth disease is generally caused by low immunity, the use of a large number of broad-spectrum antibiotics and other factors, the patient’s tongue, buccal mucosa, palate and other parts of the white patches, patients of different ages will have different symptoms, the child will have difficulty in breastfeeding, restlessness and crying symptoms, adult patients will be mild pain, burning discomfort, dry mouth and other symptoms. 2. Oral lichen planus: oral lichen planus may be related to heredity, infection, mental and other factors, the patient’s oral mucosa will appear white streaks damage, and accompanied by burning sensation, burning pain, irritation, itching and other symptoms. 3. Oral leukoplakia: oral leukoplakia is generally caused by long-term smoking, alcohol stimulation, infection and other factors, oral leukoplakia occurs in the inner lip mucous membrane, lips, tongue and other parts of the mouth, generally no obvious symptoms, some patients may have painful symptoms. If there is white flocculation inside the lips, you can observe for a period of time, and if it is accompanied by other symptoms, you should go to the hospital in time for medical treatment, and follow the doctor’s instructions after diagnosis.