Ice boron powder is used to treat mouth ulcers caused by heat and toxins, generally mild cases of mouth ulcers will have better relief after 3-5 days of medication, larger and deeper ulcers need a longer healing time, the specific time varies from person to person. Patients who have not experienced significant relief after 1-2 weeks of medication are advised to follow up promptly. The main ingredients of Ice Boron San are Ice Tablet, Borax, Cinnabar and Xuanming Powder. It has the effect of clearing away heat and detoxification (removing heat and toxicity and evil qi from the body), subduing swelling and relieving pain (eliminating swelling and pain), and applying it locally to the lesion area has a therapeutic effect on mouth ulcers. Its contraindications are unclear and may lead to allergic stomatitis, abdominal pain and other adverse reactions. Use with caution in pregnant women. During the medication, pay attention to a light diet, avoid spicy, greasy food, quit smoking and alcohol to prevent the condition from worsening. Drugs should be used under the guidance of a doctor, it is recommended to visit a regular medical institution to receive professional treatment.