Mouth ulcers can eat clear heat and swelling Chinese medicines, such as Niuhuang Shangqing Pills, Niuhuang Detoxification Tablets, etc., containing watermelon cream tablets or Huasu tablets, vitamin C and B, etc., will promote the healing of mouth ulcers and get better faster. Mouth ulcers mostly occur in people with low immunity and are caused by viral invasion, which usually heals itself in about 10 days without treatment. The main treatment for mouth ulcers is prevention: 1. pay attention to the cleanliness of the mouth. 2. avoid eating too hard food that cuts the oral mucosa, thus increasing the chance of infection. 3. eat a balanced diet, eat more fruits and take vitamins. 4. do not stay up late and ensure sufficient sleep time. 5. strengthen exercise to increase physical fitness. 6. regulate the emotions.