The main medicinal effect of Yunnan Baiyao powder is to invigorate blood circulation and remove blood stasis, which is extremely unsuitable for the treatment of mouth ulcers. Patients are advised to stop using such methods, which can easily lead to bleeding of mouth ulcers. Yunnan Baiyao is mainly used for the treatment of bruises and injuries, and is not related to oral mucosal diseases, so patients should not use it. You can use watermelon cream spray, open throat sword spray and rehabilitation new liquid gargle for mouth ulcers, which can play a better role in promoting healing and relieving pain. Mouth ulcers can also be healed by using iodine-containing coatings applied to the surface of the ulcer, which also have a certain effect on the mucous membrane of the mouth to promote healing, while recurrent mouth ulcers can be healed by Chinese medicine and active nutritional support.