The first step in the treatment of canker sores is to use a sensitive antibacterial drug for intravenous infusion. Since most canker sores are infected with Gram-positive cocci, especially Staphylococcus aureus, the most commonly used drugs are penicillin or cephalosporin, which are recommended for intravenous infusion. You can also choose to apply magnesium sulfate wet compresses or apply ichthyolite ointment or Ruyi Jinhuang San, etc. depending on the situation. In the case of canker sores with abnormal discharge, bacterial cultures and drug sensitivity tests can be obtained to guide the use of antimicrobial drugs. For canker sores caused by diabetic patients, active control of blood sugar is also recommended, with insulin or insulin pumps recommended for smoother control. In the case of abscess formation, incision and drainage should be performed in a timely manner, the excision should be large, the necrotic tissue should be thoroughly removed, and hydrogen peroxide, saline and iodophor should be applied to repeatedly rinse and place it.