Young children with blisters on the inside of the lower lip need to be treated according to the cause, if it is a small lip gland, it is a normal phenomenon and does not require special treatment; if it is thrush, herpetic stomatitis, then it needs general treatment and medication. 1. Lip glands: young children with blisters on the inside of the lower lip, if the transparent granular, generally small lip glands, small glandular vesicles, not obvious in adulthood, more obvious in early childhood, belonging to the normal secretion of saliva tissue. No special treatment is needed. 2. Thrush: Candida albicans infection on the surface of the oral mucosa to form a white patch of disease. It can also appear as blisters on the inside of the lower lip, but it is generally painless and does not cause refusal to eat, crying, etc. Oral antifungal medication is generally not needed. Available 2% sodium bicarbonate solution before and after breastfeeding to clean the mouth, or local application of 100,000 ~ 200,000U / ml of mycotoxin solution. 3. Herpetic stomatitis: the above situation can also occur, parents need to pay attention to keep the baby’s mouth clean, drink more water, to slightly warm or cool liquid food is appropriate, avoid stimulating food. Local application of watermelon cream, etc., severe pain can be applied before meals with 2% lidocaine localized. Young children with unexplained blisters on the inner side of the lower lip should seek medical attention in a timely manner and be treated under the guidance of a doctor. Pay attention to oral hygiene and develop good hygiene habits. The above drugs should be used under the guidance of a doctor.