The causes of blisters on the tongue of a one-year-old baby can be divided into two kinds of physical and pathological causes, to determine the cause of blisters through oral examination before treating the symptoms: a. Physical causes: If the tongue is injured due to inadvertent bites, food burns, teeth too sharp, foreign objects scraped, etc., a wound will be formed on the tongue surface leading to blistering. You can do without special treatment or apply drugs that promote the healing of ulcers. In life, you can control your baby not to bite too hard, keep your mouth clean, and replace softer toys or pacifiers. Second, the pathological reasons: 1, ulcers: baby has oral ulcers considered with the lack of vitamins trace elements, low immunity, you can use aerosol-type drugs to promote healing, such as watermelon cream spray. For babies who are paranoid and picky eaters, you can give your baby appropriate vitamin supplements; 2. Chickenpox: caused by chickenpox-herpes zoster, which may start from the mouth and then spread to all parts of the body. Because the baby is relatively young, try not to consider the use of antiviral drugs orally, you can use Chinese medicine or smear type drugs for treatment; 3, hand, foot and mouth disease: if the tongue blisters, while the heart of the feet and palms also blisters, may be hand, foot and mouth disease, immediately isolated, sent to the hospital for treatment; 4, other diseases: tongue blisters, but also consider whether cysts, tongue papilloma, hemangioma, etc., promptly sent to the hospital for surgical removal. The hospital for surgery to remove.