Milky bumps on the lining of the mouth may be caused by conditions such as sebaceous gland ectasia, herpes, and mucous gland cysts. 1. Sebaceous ectasia: Sebaceous ectasia occurs on the lips, oral mucosa and other parts of the mouth, and is mainly a separate papule with yellowish or white granules. The cause of the disease is unknown, generally may be related to trauma or irritation, etc., is a benign hyperplasia can be without treatment. 2. Herpes: Herpes is mainly caused by herpes simplex virus infection, and will appear round or round-like blisters, in clusters and can cause pain, erosion and other symptoms. Antiviral drugs such as acyclovir tablets, famciclovir capsules, stavudine tablets, etc. can be taken according to the doctor’s advice, or acyclovir ointment can be used topically. 3. Mucous gland cysts: Mucous gland cysts are usually associated with bad habits such as lip biting or lip licking, which can block the ducts of the mucous glands inside the lips and form light blue transparent blisters, which need to be surgically removed and treated. As the inner wall of the mouth appear small rice bumps have a variety of reasons, so once found abnormalities, it is recommended to consult a doctor in a timely manner, so as not to delay the condition, the use of drugs should also follow the doctor’s advice, do not take the drug on their own.