Gum ulcers spray alcohol is possible, but will cause severe pain, not recommended. Gum ulcers spray alcohol has a certain disinfecting effect, but does not treat the ulcer, and the ulcer is not protected by mucous membrane, spray alcohol will cause severe pain, is generally not recommended. If you want to disinfect can use povidone-iodine for spraying, can also use mouthwash containing iodine, for gargling. Gum ulcers can be treated with a hydrogen peroxide solution for localized wiping and rinsing to help remove necrotic tissue, or with medications such as chlorhexidine gargle and cediriodine tablets to promote inflammation. Patients with serious conditions can also take the use of metronidazole, tinidazole and other drugs for anti-inflammatory sterilization treatment under the guidance of the doctor. If the pain is more serious, the use of lidocaine gel, benzocaine gel and other drugs under the guidance of the doctor to help quickly anesthesia pain. Gum ulcers occur, it is not recommended that the patient spray alcohol, the patient can be under the guidance of the doctor to follow the doctor’s instructions to use medication for treatment. If disinfection is needed, alcohol can be replaced with povidone-iodine to reduce irritation to the wound.