The treatment of mouth sores in pregnant women requires targeted measures according to the possible causes: if the symptoms of mouth sores occur after eating hot pot, spicy hotpot and other spicy and stimulating foods, it is mostly due to spicy and stimulating foods that cause internal heat and fire symptoms in pregnant women, so they can be treated with appropriate fire-relieving medications, such as stomatitis granules, and it is recommended to follow the doctor’s advice on how to use the medications. At the same time, you can take appropriate bitter vegetables, bitter melon and other foods to clear heat and fire, and drink more water; if the symptoms occur after overwork and poor rest, it is mostly considered to be caused by poor living habits that cause the immune function of pregnant women to decline, resulting in viral infections, and can be treated with appropriate antiviral drugs under the guidance of a doctor; if it occurs in pregnant women with excessive long-term pregnancy vomiting, excessive dieting, and partial eating, it may be related to B vitamin deficiency and should be appropriately supplemented.