First, gargle with strong tea "Compendium of Materia Medica" in the Ming Dynasty Pharmacopoeia of China said: "Tea is bitter and cold, which can best reduce the fire ... when the fire falls, it will clear the liquid." According to research, tea contains tannin, which has astringent effect, and can promote the healing of oral ulcer. Tea can also diminish inflammation and sterilize. Because tannin can coagulate the protein of unicellular fungi, people often use tea soup to wash wounds to sterilize and promote wound healing. Tea is also rich in vitamin C (vitamin C has anti-scurvy effect) and vitamin B 12 (it can prevent and treat all kinds of inflammation). Others, such as vitamin P and vitamin K, have certain effects on the rehabilitation of oral ulcer surface. Second, the gentamicin therapy uses a sterile cotton swab dipped in gentamicin 40,000 international units 2m 1 injection to lightly coat the ulcer surface in the mouth, and then apply it again after a few minutes, four times a day. It is best to apply the liquid medicine after three meals and gargling before going to bed, which usually heals in 2 ~ 3 days. If it is multiple oral ulcers or oral erosion, 40,000 international units of 2m 1 gentamicin can be used to dilute it with water for injection into 10ml, and it will be spit out after 3 minutes. Once every 6 hours, it has a good effect. Third, vitamin E therapy Take several vitamin E sugar-coated tablets and grind them into fine powder, and apply them to the ulcer surface four times a day, and it will be cured in 3 ~ 4 days. After that, you can take 1 ~ 2 tablets every night before going to bed and continue to take1month to prevent recurrence. Iv. Vitamin B 12 and Vitamin C Therapy Take one piece of vitamin B 12 and one piece of vitamin C and grind them into powder and mix well. Dip a little sterile cotton ball and apply it on the ulcer surface for 5 ~10 minutes, so that the medicine can be directly absorbed (the oral effect is extremely slow), and generally it can be cured after 3 ~ 4 times. The mechanism is that vitamin B 12 can promote human metabolism. However, the concentration of vitamin B 12 in human body is very low, and it is rarely stored. Vitamin C can reduce the permeability of capillaries and reduce the edema of ulcer surface. The combination of the two drugs can play a role in local anti-inflammation, bacteriostasis and pain relief, accelerate the healing of ulcer surface, and make the ulcer difficult to recur. Five, dandelion decoction oral and gargle dandelion, bitter, sweet, cold, can clear away heat and detoxification. Take fresh dandelion 100g (50g dry product), wash and decoct in water, drink the liquid medicine and gargle. Several times a day until it stops. Six, Yunnan Baiyao therapy with sterile cotton swabs dipped in Yunnan Baiyao powder to coat the ulcer surface, the vast majority of people can recover after 3 days of medication. Seven, Chinese patent medicine external application with tin powder, ice boron powder or Houfeng powder sprayed on the ulcer surface.