At present, there are many kinds of mouth ulcer sprays in the clinic, such as mouth ulcer powder, open-throat sword spray, watermelon cream spray, stomatitis spray and so on. Their main ingredients are all Chinese medicines, which are mainly used for all kinds of mouth ulcers, mucous membrane rupture and ulcers caused by redness, swelling, burning pain and other complications. The main effect of mouth ulcer spray is to remove internal heat, mouth ulcers local anti-inflammatory, swelling, pain, and promote the growth of mucosal soft tissue, so that mouth ulcers heal as soon as possible. Because they are all herbal ingredients, mouth ulcer sprays generally have no obvious side effects and adverse reactions, but should be used with caution for patients with allergies and children under four years of age.