There are many reasons that can lead to oral inflammation (ulcer). If it is stubborn and does not heal for a long time, it is recommended to go to Peking University Stomatological Hospital to see an expert! There is the most authoritative dental hospital in China. If it is just an accident, you can use oral ulcer powder or Bingbo powder and oral vitamin b2. Eat more fruits, vegetables and fruits! If it is caused by dental disease, do not seek medical treatment randomly, it may cause The more the treatment, the more severe it becomes, so you need to go to the dental department for symptomatic treatment of the teeth! I am a dentist. If you have any questions, you can continue to ask me ≈ Feng Guo Wuhen ≈ and I will answer your questions. I hope it can help you, and I also hope you can adopt it. Thank you