Usually there is no fast way to eliminate the swelling of mouth ulcers, patients can relieve the condition through general treatment, drug treatment, physical therapy and other ways. 1. General treatment: patients should maintain oral hygiene, prevent secondary infection, pay attention to a light diet, avoid too spicy and stimulating food, no smoking and alcohol during the period of illness, so as not to aggravate the stimulation of the trauma, resulting in severe swelling. 2. Medication: patients can use topical painkillers such as lidocaine under the guidance of a doctor; gargles such as chlorhexidine gargle, 0.1% isacridine liquid, etc.; drugs to promote healing, such as recombinant epidermal growth factor gel, etc., and can also be used locally to nourish the yin and muscle, ice boron, oral ulcers, etc. for treatment to alleviate the symptoms. 3. Physical therapy: the ulcer can also be irradiated by laser, visible light or microwave therapy instrument to reduce exudation and promote the healing effect. It is recommended to strictly follow the doctor’s prescription of medication, do not change the dose of medication without authorization or private abuse of drugs, pay attention to oral care in life, regular review.