A child with white blisters on the tongue is considered to have a mouth ulcer, thrush or herpetic stomatitis. Parents should promptly take their children to the pediatric or stomatology department of the hospital for consultation and targeted treatment after diagnosis of the cause. Common causes and treatments 1, mouth ulcers: children lack of vitamin C, vitamin B1, iron, zinc and other nutrients, may lead to a decline in body immunity, causing the phenomenon of mouth ulcers, the child’s tongue will appear white bubbles, and pain. Parents can give their children medicines such as zinc gluconate and multivitamin tablets under the guidance of doctors, give them more water and eat vegetables and fruits containing vitamins, such as tomatoes, cabbage, spinach, bananas and kiwi. For older children, you can spray the affected area with topical watermelon cream spray to reduce pain; 2, thrush: children with low immunity, or a history of antibiotics, glucocorticoids medication, easily infected with Candida albicans, resulting in thrush occurs, in addition to white bubbles on the tongue, the oral mucosa at the whitening phenomenon also occurs. Parents can use baking soda to clean the child’s mouth under the guidance of a doctor, and then use bacteriophage tablets and cod liver oil to coat the affected area, which can significantly improve the symptoms; 3, herpes stomatitis: herpes simplex virus infection leads to the onset of herpes stomatitis, the child will have white bubbles on the tongue, accompanied by depression, fever, vomiting and other symptoms. Parents can apply antiviral medication under the guidance of a doctor, such as spray interferon or ribavirin. Parents should pay more attention to their children’s oral hygiene, give them warm water and warm and soft food, such as noodles and rice paste, and give them vitamins to improve their immunity and help speed up their recovery.